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Grade 3 · Maths · curriculum collection

Grade 3 Maths, Common Core domains

8 units for Grade 3 maths, organised by Common Core domain: Operations and Algebraic Thinking, Number and Operations in Base Ten, Number and Operations: Fractions, Measurement and Data. Each unit has a short lesson, a practice worksheet and a review worksheet, both with answer keys.

8 units16 worksheets192 questions with answers
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Answer-checked and approved on 29 October 2026

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Aligned by StudyBrix at domain level. Not an official publication of, or endorsed by, the standards' authors. Framework: Common Core State Standards for Mathematics.

Units in teaching order

01

3.OA Operations and Algebraic Thinking

Arithmetic

The equal sign and balanced equations, division facts and multiplication facts.

Short lesson: Balance two sides

Study guide for Grades 2 to 4: 2 worked examples and 2 practice questions. Work out one side, then subtract the known part.

a + □ = b + c

Work out one side, then subtract the known part.

Worked example

Find the missing number: 22 + □ = 13 + 41.

13 + 41 − 22 = 32

Answer: 32

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. 8 × 7 = ?

  2. Find the missing number: 2 + □ = 23 + 8.

  3. 77 ÷ 7 = ?

  4. 2 × 2 = ?

  5. Find the missing number: 7 + □ = 4 + 12.

  6. 18 ÷ 2 = ?

  7. 2 × 5 = ?

  8. Find the missing number: 3 + □ = 9 + 1.

  9. 6 ÷ 6 = ?

  10. 1 × 8 = ?

  11. Find the missing number: 29 + □ = 8 + 25.

  12. 99 ÷ 11 = ?

Answer key
  1. 56 8 × 7 = 56
  2. 29 23 + 8 − 2 = 29
  3. 11 7 × 11 = 77
  4. 4 2 × 2 = 4
  5. 9 4 + 12 − 7 = 9
  6. 9 2 × 9 = 18
  7. 10 2 × 5 = 10
  8. 7 9 + 1 − 3 = 7
  9. 1 6 × 1 = 6
  10. 8 1 × 8 = 8
  11. 4 8 + 25 − 29 = 4
  12. 9 11 × 9 = 99
Review worksheet: 12 questions

  1. Find the missing number: 28 + □ = 44 + 1.

  2. 100 ÷ 10 = ?

  3. 11 × 11 = ?

  4. Find the missing number: 21 + □ = 20 + 20.

  5. 9 ÷ 3 = ?

  6. 8 × 6 = ?

  7. Find the missing number: 30 + □ = 59 + 2.

  8. 40 ÷ 10 = ?

  9. 9 × 8 = ?

  10. Find the missing number: 12 + □ = 22 + 25.

  11. 32 ÷ 4 = ?

  12. 6 × 7 = ?

Answer key
  1. 17 44 + 1 − 28 = 17
  2. 10 10 × 10 = 100
  3. 121 11 × 11 = 121
  4. 19 20 + 20 − 21 = 19
  5. 3 3 × 3 = 9
  6. 48 8 × 6 = 48
  7. 31 59 + 2 − 30 = 31
  8. 4 10 × 4 = 40
  9. 72 9 × 8 = 72
  10. 35 22 + 25 − 12 = 35
  11. 8 4 × 8 = 32
  12. 42 6 × 7 = 42

Related ready-made worksheets: Grade 3 Arithmetic worksheet

02

3.OA Operations and Algebraic Thinking

Number patterns

Number patterns.

Short lesson: Number patterns

In a number pattern, the same rule takes you from each number to the next.

  • Find the rule. Work out the difference between neighbouring numbers. If it is always the same, that is the rule.
  • Check the rule. Make sure the rule works for every pair of numbers, not only the first two.
  • Continue the pattern. Apply the rule to the last number to find the next one.

Worked example

What comes next? 47, 63, 79, 95, ...

Each number is 16 more than the one before: 63 is 47 + 16, and so on. So the next number is 95 + 16 = 111.

Answer: 111

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. What comes next? 40, 54, 68, 82, …

  2. What comes next? 9, 16, 23, 30, …

  3. What comes next? 39, 44, 49, 54, …

  4. What comes next? 69, 71, 73, 75, …

  5. What comes next? 47, 71, 95, 119, …

  6. What comes next? 25, 36, 47, 58, …

  7. What comes next? 31, 34, 37, 40, …

  8. What comes next? 29, 54, 79, 104, …

  9. What comes next? 20, 43, 66, 89, …

  10. What comes next? 33, 54, 75, 96, …

  11. What comes next? 63, 76, 89, 102, …

  12. What comes next? 78, 92, 106, 120, …

Answer key
  1. 96 82 + 14 = 96
  2. 37 30 + 7 = 37
  3. 59 54 + 5 = 59
  4. 77 75 + 2 = 77
  5. 143 119 + 24 = 143
  6. 69 58 + 11 = 69
  7. 43 40 + 3 = 43
  8. 129 104 + 25 = 129
  9. 112 89 + 23 = 112
  10. 117 96 + 21 = 117
  11. 115 102 + 13 = 115
  12. 134 120 + 14 = 134
Review worksheet: 12 questions

  1. What comes next? 63, 72, 81, 90, …

  2. What comes next? 23, 35, 47, 59, …

  3. What comes next? 55, 63, 71, 79, …

  4. What comes next? 79, 90, 101, 112, …

  5. What comes next? 16, 36, 56, 76, …

  6. What comes next? 76, 90, 104, 118, …

  7. What comes next? 43, 62, 81, 100, …

  8. What comes next? 75, 92, 109, 126, …

  9. What comes next? 58, 75, 92, 109, …

  10. What comes next? 7, 15, 23, 31, …

  11. What comes next? 45, 56, 67, 78, …

  12. What comes next? 75, 87, 99, 111, …

Answer key
  1. 99 90 + 9 = 99
  2. 71 59 + 12 = 71
  3. 87 79 + 8 = 87
  4. 123 112 + 11 = 123
  5. 96 76 + 20 = 96
  6. 132 118 + 14 = 132
  7. 119 100 + 19 = 119
  8. 143 126 + 17 = 143
  9. 126 109 + 17 = 126
  10. 39 31 + 8 = 39
  11. 89 78 + 11 = 89
  12. 123 111 + 12 = 123

Related ready-made worksheets: Grade 3 Algebra worksheet

03

3.NBT Number and Operations in Base Ten

Place value

Rounding to the nearest hundred, place value and rounding to the nearest ten.

Short lesson: Round to the nearest ten

Study guide for Grades 2 to 3: 2 worked examples and 2 practice questions. For positive whole numbers, inspect the ones digit.

0-4 → down; 5-9 → up

For positive whole numbers, inspect the ones digit.

Worked example

Round 241 to the nearest ten.

241 → 240

Answer: 240

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. What is the value of the hundreds digit in 5076?

  2. Round 2731 to the nearest hundred.

  3. Round 317 to the nearest ten.

  4. What is the value of the hundreds digit in 3568?

  5. Round 9293 to the nearest hundred.

  6. Round 44 to the nearest ten.

  7. What is the value of the hundreds digit in 3686?

  8. Round 5495 to the nearest hundred.

  9. Round 75 to the nearest ten.

  10. What is the value of the hundreds digit in 5360?

  11. Round 7161 to the nearest hundred.

  12. Round 27 to the nearest ten.

Answer key
  1. 0 0 × 100 = 0
  2. 2700 2731 → 2700
  3. 320 317 → 320
  4. 500 5 × 100 = 500
  5. 9300 9293 → 9300
  6. 40 44 → 40
  7. 600 6 × 100 = 600
  8. 5500 5495 → 5500
  9. 80 75 → 80
  10. 300 3 × 100 = 300
  11. 7200 7161 → 7200
  12. 30 27 → 30
Review worksheet: 12 questions

  1. Round 2356 to the nearest hundred.

  2. Round 248 to the nearest ten.

  3. What is the value of the hundreds digit in 7843?

  4. Round 344 to the nearest hundred.

  5. Round 79 to the nearest ten.

  6. What is the value of the hundreds digit in 3132?

  7. Round 7816 to the nearest hundred.

  8. Round 340 to the nearest ten.

  9. What is the value of the hundreds digit in 1760?

  10. Round 2120 to the nearest hundred.

  11. Round 233 to the nearest ten.

  12. What is the value of the hundreds digit in 4992?

Answer key
  1. 2400 2356 → 2400
  2. 250 248 → 250
  3. 800 8 × 100 = 800
  4. 300 344 → 300
  5. 80 79 → 80
  6. 100 1 × 100 = 100
  7. 7800 7816 → 7800
  8. 340 340 → 340
  9. 700 7 × 100 = 700
  10. 2100 2120 → 2100
  11. 230 233 → 230
  12. 900 9 × 100 = 900

Related ready-made worksheets: Grade 3 Number skills worksheet

04

3.NBT Number and Operations in Base Ten

Multi-digit calculation

Adding multi-digit numbers, subtracting multi-digit numbers, adding two-digit numbers and subtracting two-digit numbers.

Short lesson: Two-digit addition

Study guide for Grades 2 to 3: 2 worked examples and 2 practice questions. Regroup ten ones as one ten when needed.

ones + ones; tens + tens

Regroup ten ones as one ten when needed.

Worked example

66 + 35 = ?

66 + 35 = 101

Answer: 101

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. 314 + 193 = ?

  2. 58 + 10 = ?

  3. 94 − 31 = ?

  4. 999 − 147 = ?

  5. 791 + 183 = ?

  6. 76 + 14 = ?

  7. 97 − 51 = ?

  8. 595 − 270 = ?

  9. 540 + 376 = ?

  10. 85 + 56 = ?

  11. 68 − 25 = ?

  12. 268 − 125 = ?

Answer key
  1. 507 314 + 193 = 507
  2. 68 58 + 10 = 68
  3. 63 63 + 31 = 94
  4. 852 999 − 147 = 852
  5. 974 791 + 183 = 974
  6. 90 76 + 14 = 90
  7. 46 46 + 51 = 97
  8. 325 595 − 270 = 325
  9. 916 540 + 376 = 916
  10. 141 85 + 56 = 141
  11. 43 43 + 25 = 68
  12. 143 268 − 125 = 143
Review worksheet: 12 questions

  1. 63 − 17 = ?

  2. 73 + 74 = ?

  3. 455 − 376 = ?

  4. 319 + 180 = ?

  5. 67 − 21 = ?

  6. 83 + 22 = ?

  7. 817 − 557 = ?

  8. 92 + 92 = ?

  9. 67 − 63 = ?

  10. 36 + 71 = ?

  11. 863 − 77 = ?

  12. 236 + 154 = ?

Answer key
  1. 46 46 + 17 = 63
  2. 147 73 + 74 = 147
  3. 79 455 − 376 = 79
  4. 499 319 + 180 = 499
  5. 46 46 + 21 = 67
  6. 105 83 + 22 = 105
  7. 260 817 − 557 = 260
  8. 184 92 + 92 = 184
  9. 4 4 + 63 = 67
  10. 107 36 + 71 = 107
  11. 786 863 − 77 = 786
  12. 390 236 + 154 = 390

Related ready-made worksheets: Grade 3 Arithmetic worksheet

05

3.NF Number and Operations: Fractions

Fraction concepts and operations

Equivalent fractions and fractions that make a whole.

Short lesson: Complete one whole

Study guide for Grades 3 to 5: 2 worked examples and 2 practice questions. Keep the common denominator while finding the missing numerator.

a/b + (b − a)/b = 1

Keep the common denominator while finding the missing numerator.

Worked example

17/20 + □ = 1

17/20 + 3/20 = 20/20 = 1

Answer: 3/20

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. 1/6 = □/54

  2. 3/19 + □ = 1

  3. 7/12 = □/144

  4. 2/7 + □ = 1

  5. 7/15 = □/45

  6. 11/17 + □ = 1

  7. 9/18 = □/144

  8. 4/10 + □ = 1

  9. 12/13 = □/117

  10. 9/11 + □ = 1

  11. 7/13 = □/156

  12. 7/9 + □ = 1

Answer key
  1. 9 1 × 9 = 9; 6 × 9 = 54
  2. 16/19 3/19 + 16/19 = 19/19 = 1
  3. 84 7 × 12 = 84; 12 × 12 = 144
  4. 5/7 2/7 + 5/7 = 7/7 = 1
  5. 21 7 × 3 = 21; 15 × 3 = 45
  6. 6/17 11/17 + 6/17 = 17/17 = 1
  7. 72 9 × 8 = 72; 18 × 8 = 144
  8. 3/5 4/10 + 6/10 = 10/10 = 1
  9. 108 12 × 9 = 108; 13 × 9 = 117
  10. 2/11 9/11 + 2/11 = 11/11 = 1
  11. 84 7 × 12 = 84; 13 × 12 = 156
  12. 2/9 7/9 + 2/9 = 9/9 = 1
Review worksheet: 12 questions

  1. 1/8 = □/96

  2. 4/6 + □ = 1

  3. 8/15 = □/45

  4. 12/17 + □ = 1

  5. 11/20 = □/240

  6. 15/16 + □ = 1

  7. 11/20 = □/220

  8. 14/18 + □ = 1

  9. 7/14 = □/154

  10. 16/17 + □ = 1

  11. 9/14 = □/84

  12. 1/14 + □ = 1

Answer key
  1. 12 1 × 12 = 12; 8 × 12 = 96
  2. 1/3 4/6 + 2/6 = 6/6 = 1
  3. 24 8 × 3 = 24; 15 × 3 = 45
  4. 5/17 12/17 + 5/17 = 17/17 = 1
  5. 132 11 × 12 = 132; 20 × 12 = 240
  6. 1/16 15/16 + 1/16 = 16/16 = 1
  7. 121 11 × 11 = 121; 20 × 11 = 220
  8. 2/9 14/18 + 4/18 = 18/18 = 1
  9. 77 7 × 11 = 77; 14 × 11 = 154
  10. 1/17 16/17 + 1/17 = 17/17 = 1
  11. 54 9 × 6 = 54; 14 × 6 = 84
  12. 13/14 1/14 + 13/14 = 14/14 = 1

Related ready-made worksheets: Grade 3 Fractions worksheet

06

3.MD Measurement and Data

Area, perimeter and volume

Perimeter of rectangles, area of rectangles, finding a missing side from the area and perimeter of squares.

Short lesson: Find a missing rectangle side

Study guide for Grades 3 to 6: 2 worked examples and 2 practice questions. Use consistent length and area units.

width = area ÷ length

Use consistent length and area units.

Worked example

A rectangle has area 648 cm² and length 27 cm. Find its width in cm.

648 ÷ 27 = 24

Answer: 24 cm

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. A rectangle is 11 cm long and 12 cm wide. Find its perimeter in cm.

  2. A rectangle has area 48 cm² and length 8 cm. Find its width in cm.

  3. Find the area of a 24 cm by 42 cm rectangle, in cm².

  4. A square has side 3 cm. Find its perimeter in cm.

  5. A rectangle is 20 cm long and 39 cm wide. Find its perimeter in cm.

  6. A rectangle has area 45 cm² and length 3 cm. Find its width in cm.

  7. Find the area of a 48 cm by 12 cm rectangle, in cm².

  8. A square has side 4 cm. Find its perimeter in cm.

  9. A rectangle is 52 cm long and 63 cm wide. Find its perimeter in cm.

  10. A rectangle has area 651 cm² and length 31 cm. Find its width in cm.

  11. Find the area of a 35 cm by 38 cm rectangle, in cm².

  12. A square has side 86 cm. Find its perimeter in cm.

Answer key
  1. 46 cm 2 × (11 + 12) = 46 cm
  2. 6 cm 48 ÷ 8 = 6
  3. 1008 cm² 24 × 42 = 1008 cm²
  4. 12 cm 4 × 3 = 12
  5. 118 cm 2 × (20 + 39) = 118 cm
  6. 15 cm 45 ÷ 3 = 15
  7. 576 cm² 48 × 12 = 576 cm²
  8. 16 cm 4 × 4 = 16
  9. 230 cm 2 × (52 + 63) = 230 cm
  10. 21 cm 651 ÷ 31 = 21
  11. 1330 cm² 35 × 38 = 1330 cm²
  12. 344 cm 4 × 86 = 344
Review worksheet: 12 questions

  1. Find the area of a 58 cm by 38 cm rectangle, in cm².

  2. A rectangle is 6 cm long and 22 cm wide. Find its perimeter in cm.

  3. A rectangle has area 126 cm² and length 7 cm. Find its width in cm.

  4. A square has side 34 cm. Find its perimeter in cm.

  5. Find the area of a 40 cm by 54 cm rectangle, in cm².

  6. A rectangle is 58 cm long and 44 cm wide. Find its perimeter in cm.

  7. A rectangle has area 160 cm² and length 8 cm. Find its width in cm.

  8. A square has side 21 cm. Find its perimeter in cm.

  9. Find the area of a 31 cm by 44 cm rectangle, in cm².

  10. A rectangle is 25 cm long and 22 cm wide. Find its perimeter in cm.

  11. A rectangle has area 360 cm² and length 15 cm. Find its width in cm.

  12. A square has side 14 cm. Find its perimeter in cm.

Answer key
  1. 2204 cm² 58 × 38 = 2204 cm²
  2. 56 cm 2 × (6 + 22) = 56 cm
  3. 18 cm 126 ÷ 7 = 18
  4. 136 cm 4 × 34 = 136
  5. 2160 cm² 40 × 54 = 2160 cm²
  6. 204 cm 2 × (58 + 44) = 204 cm
  7. 20 cm 160 ÷ 8 = 20
  8. 84 cm 4 × 21 = 84
  9. 1364 cm² 31 × 44 = 1364 cm²
  10. 94 cm 2 × (25 + 22) = 94 cm
  11. 24 cm 360 ÷ 15 = 24
  12. 56 cm 4 × 14 = 56

Related ready-made worksheets: Grade 3 Geometry worksheet

07

3.MD Measurement and Data

Measurement & time

Elapsed time and converting hours and minutes.

Short lesson: Hours and minutes

Study guide for Grades 2 to 4: 2 worked examples and 2 practice questions. Multiply hours by sixty, then add the extra minutes.

1 hour = 60 minutes

Multiply hours by sixty, then add the extra minutes.

Worked example

Convert 6 hours and 37 minutes to minutes.

6 × 60 + 37 = 397

Answer: 397 min

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. Convert 1 hours and 58 minutes to minutes.

  2. An activity starts at 16:27 and ends at 19:18 on the same day (24-hour clock). How many minutes does it last?

  3. Convert 7 hours and 16 minutes to minutes.

  4. An activity starts at 15:40 and ends at 18:30 on the same day (24-hour clock). How many minutes does it last?

  5. Convert 7 hours and 23 minutes to minutes.

  6. An activity starts at 03:08 and ends at 07:00 on the same day (24-hour clock). How many minutes does it last?

  7. Convert 9 hours and 26 minutes to minutes.

  8. An activity starts at 17:02 and ends at 18:18 on the same day (24-hour clock). How many minutes does it last?

  9. Convert 4 hours and 40 minutes to minutes.

  10. An activity starts at 11:26 and ends at 12:51 on the same day (24-hour clock). How many minutes does it last?

  11. Convert 7 hours and 26 minutes to minutes.

  12. An activity starts at 07:05 and ends at 08:52 on the same day (24-hour clock). How many minutes does it last?

Answer key
  1. 118 min 1 × 60 + 58 = 118
  2. 171 min 1158 − 987 = 171
  3. 436 min 7 × 60 + 16 = 436
  4. 170 min 1110 − 940 = 170
  5. 443 min 7 × 60 + 23 = 443
  6. 232 min 420 − 188 = 232
  7. 566 min 9 × 60 + 26 = 566
  8. 76 min 1098 − 1022 = 76
  9. 280 min 4 × 60 + 40 = 280
  10. 85 min 771 − 686 = 85
  11. 446 min 7 × 60 + 26 = 446
  12. 107 min 532 − 425 = 107
Review worksheet: 12 questions

  1. An activity starts at 10:24 and ends at 12:40 on the same day (24-hour clock). How many minutes does it last?

  2. Convert 9 hours and 57 minutes to minutes.

  3. An activity starts at 02:55 and ends at 03:39 on the same day (24-hour clock). How many minutes does it last?

  4. Convert 6 hours and 43 minutes to minutes.

  5. An activity starts at 04:29 and ends at 05:59 on the same day (24-hour clock). How many minutes does it last?

  6. Convert 3 hours and 9 minutes to minutes.

  7. An activity starts at 04:24 and ends at 08:02 on the same day (24-hour clock). How many minutes does it last?

  8. Convert 6 hours and 37 minutes to minutes.

  9. An activity starts at 17:08 and ends at 19:49 on the same day (24-hour clock). How many minutes does it last?

  10. Convert 7 hours and 38 minutes to minutes.

  11. An activity starts at 07:55 and ends at 10:23 on the same day (24-hour clock). How many minutes does it last?

  12. Convert 12 hours and 40 minutes to minutes.

Answer key
  1. 136 min 760 − 624 = 136
  2. 597 min 9 × 60 + 57 = 597
  3. 44 min 219 − 175 = 44
  4. 403 min 6 × 60 + 43 = 403
  5. 90 min 359 − 269 = 90
  6. 189 min 3 × 60 + 9 = 189
  7. 218 min 482 − 264 = 218
  8. 397 min 6 × 60 + 37 = 397
  9. 161 min 1189 − 1028 = 161
  10. 458 min 7 × 60 + 38 = 458
  11. 148 min 623 − 475 = 148
  12. 760 min 12 × 60 + 40 = 760

Related ready-made worksheets: Grade 3 Measurement & time worksheet

08

3.MD Measurement and Data

Data

Reading data tables.

Short lesson: Read and total a table

Study guide for Grades 1 to 3: 2 worked examples and 2 practice questions. Add the counts for all categories.

total = a + b + c

Add the counts for all categories.

Worked example

A class counts blocks: red 12, blue 5, yellow 7. How many blocks in all?

12 + 5 + 7 = 24

Answer: 24

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 12 and 12 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 12 questions

  1. A class counts blocks: red 3, blue 8, yellow 5. How many blocks in all?

  2. A class counts blocks: red 6, blue 4, yellow 10. How many blocks in all?

  3. A class counts blocks: red 11, blue 8, yellow 11. How many blocks in all?

  4. A class counts blocks: red 8, blue 7, yellow 8. How many blocks in all?

  5. A class counts blocks: red 12, blue 4, yellow 1. How many blocks in all?

  6. A class counts blocks: red 11, blue 1, yellow 1. How many blocks in all?

  7. A class counts blocks: red 8, blue 7, yellow 5. How many blocks in all?

  8. A class counts blocks: red 2, blue 2, yellow 1. How many blocks in all?

  9. A class counts blocks: red 9, blue 7, yellow 6. How many blocks in all?

  10. A class counts blocks: red 10, blue 10, yellow 6. How many blocks in all?

  11. A class counts blocks: red 5, blue 2, yellow 3. How many blocks in all?

  12. A class counts blocks: red 6, blue 12, yellow 3. How many blocks in all?

Answer key
  1. 16 3 + 8 + 5 = 16
  2. 20 6 + 4 + 10 = 20
  3. 30 11 + 8 + 11 = 30
  4. 23 8 + 7 + 8 = 23
  5. 17 12 + 4 + 1 = 17
  6. 13 11 + 1 + 1 = 13
  7. 20 8 + 7 + 5 = 20
  8. 5 2 + 2 + 1 = 5
  9. 22 9 + 7 + 6 = 22
  10. 26 10 + 10 + 6 = 26
  11. 10 5 + 2 + 3 = 10
  12. 21 6 + 12 + 3 = 21
Review worksheet: 12 questions

  1. A class counts blocks: red 10, blue 4, yellow 9. How many blocks in all?

  2. A class counts blocks: red 7, blue 9, yellow 10. How many blocks in all?

  3. A class counts blocks: red 6, blue 8, yellow 11. How many blocks in all?

  4. A class counts blocks: red 12, blue 6, yellow 6. How many blocks in all?

  5. A class counts blocks: red 8, blue 3, yellow 5. How many blocks in all?

  6. A class counts blocks: red 12, blue 2, yellow 12. How many blocks in all?

  7. A class counts blocks: red 11, blue 8, yellow 4. How many blocks in all?

  8. A class counts blocks: red 2, blue 10, yellow 5. How many blocks in all?

  9. A class counts blocks: red 7, blue 8, yellow 8. How many blocks in all?

  10. A class counts blocks: red 3, blue 12, yellow 1. How many blocks in all?

  11. A class counts blocks: red 8, blue 10, yellow 1. How many blocks in all?

  12. A class counts blocks: red 12, blue 1, yellow 8. How many blocks in all?

Answer key
  1. 23 10 + 4 + 9 = 23
  2. 26 7 + 9 + 10 = 26
  3. 25 6 + 8 + 11 = 25
  4. 24 12 + 6 + 6 = 24
  5. 16 8 + 3 + 5 = 16
  6. 26 12 + 2 + 12 = 26
  7. 23 11 + 8 + 4 = 23
  8. 17 2 + 10 + 5 = 17
  9. 23 7 + 8 + 8 = 23
  10. 16 3 + 12 + 1 = 16
  11. 19 8 + 10 + 1 = 19
  12. 21 12 + 1 + 8 = 21