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Grade 1 · Maths · curriculum collection

Grade 1 Maths, Common Core domains

6 units for Grade 1 maths, organised by Common Core domain: Operations and Algebraic Thinking, Number and Operations in Base Ten, Measurement and Data. Each unit has a short lesson, a practice worksheet and a review worksheet, both with answer keys.

6 units12 worksheets120 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

1.OA Operations and Algebraic Thinking

Arithmetic

Missing numbers in subtraction, missing numbers in addition, subtracting within 20, adding within 20, subtracting within 10 and adding within 10.

Short lesson: Addition within twenty

Study guide for Grades 1 to 2: 2 worked examples and 2 practice questions. Make ten first when it helps.

a + b = total

Make ten first when it helps.

Worked example

12 + 1 = ?

12 + 1 = 13

Answer: 13

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 10 and 10 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 10 questions

  1. 9 + □ = 16

  2. 18 − 16 = ?

  3. 10 − □ = 7

  4. 8 + 12 = ?

  5. 9 − 5 = ?

  6. 6 + 1 = ?

  7. 5 + 6 = ?

  8. 18 − 12 = ?

  9. 2 + 0 = ?

  10. 0 − 0 = ?

Answer key
  1. 7 16−9=7
  2. 2 2 + 16 = 18
  3. 3 10−7=3
  4. 20 8 + 12 = 20
  5. 4 9 − 5 = 4
  6. 7 6 + 1 = 7
  7. 11 5+6=11
  8. 6 18−12=6
  9. 2 2+0=2
  10. 0 0−0=0
Review worksheet: 10 questions

  1. 16 + □ = 20

  2. 18 − □ = 8

  3. 13 + 4 = ?

  4. 11 − 8 = ?

  5. 14 + 2 = ?

  6. 1 + 4 = ?

  7. 10 − 5 = ?

  8. 19 − 0 = ?

  9. 8 + 8 = ?

  10. 5 + □ = 12

Answer key
  1. 4 20−16=4
  2. 10 18−8=10
  3. 17 13 + 4 = 17
  4. 3 3 + 8 = 11
  5. 16 14+2=16
  6. 5 1 + 4 = 5
  7. 5 10 − 5 = 5
  8. 19 19−0=19
  9. 16 Double 8 is 16.
  10. 7 12−5=7

Related ready-made worksheets: Grade 1 Arithmetic worksheet

02

1.NBT Number and Operations in Base Ten

Counting to 120

Counting to 20, the number before, the number after and missing numbers in a count.

Short lesson: Counting

Counting tells us how many. Each number is one more than the number before it.

  • One count for each object. Touch or point to each object once as you say each number.
  • The last number is the total. The last number you say tells you how many there are.
  • One more, one less. The number after is one more. The number before is one less.

Worked example

What number comes after 11?

Count on by one: 11, 12. The number after 11 is 12.

Answer: 12

Worksheets

A practice worksheet and a review worksheet, 10 and 10 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 10 questions

  1. What number comes before 14?

  2. 13, 14, □, 16

  3. Count the dots: ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

  4. What number comes after 11?

  5. What number comes before 11?

  6. 15, 16, □, 18

  7. Count the dots: ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

  8. What number comes after 16?

  9. What number comes before 5?

  10. 14, 15, □, 17

Answer key
  1. 13 13 comes before 14.
  2. 15 The numbers count up by one.
  3. 20 There are 20 dots.
  4. 12 12 comes after 11.
  5. 10 10 comes before 11.
  6. 17 The numbers count up by one.
  7. 19 There are 19 dots.
  8. 17 17 comes after 16.
  9. 4 4 comes before 5.
  10. 16 The numbers count up by one.
Review worksheet: 10 questions

  1. Count the dots: ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

  2. 12, 13, □, 15

  3. What number comes after 5?

  4. What number comes before 6?

  5. Count the dots: ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

  6. 4, 5, □, 7

  7. What number comes after 9?

  8. What number comes before 12?

  9. Count the dots: ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ● ●

  10. 2, 3, □, 5

Answer key
  1. 16 There are 16 dots.
  2. 14 The numbers count up by one.
  3. 6 6 comes after 5.
  4. 5 5 comes before 6.
  5. 18 There are 18 dots.
  6. 6 The numbers count up by one.
  7. 10 10 comes after 9.
  8. 11 11 comes before 12.
  9. 17 There are 17 dots.
  10. 4 The numbers count up by one.

Related ready-made worksheets: Grade 1 Counting worksheet

03

1.NBT Number and Operations in Base Ten

Place value

Comparing two-digit numbers, comparing numbers and tens and ones.

Short lesson: Tens and ones

Study guide for Grades 1 to 2: 2 worked examples and 2 practice questions. A group of ten can be exchanged for ten ones.

number = 10 × tens + ones

A group of ten can be exchanged for ten ones.

Worked example

Write the number with 8 tens and 1 ones.

8 × 10 + 1 = 81

Answer: 81

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 10 and 10 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 10 questions

  1. 6 tens and 1 ones make what number?

  2. Choose the symbol: 90 □ 27

    1. >
    2. =
    3. <

  3. Which number is greater: 16 or 5?

    1. 5
    2. 16

  4. Write the number with 9 tens and 9 ones.

  5. 6 tens and 9 ones make what number?

  6. Choose the symbol: 69 □ 36

    1. =
    2. >
    3. <

  7. Which number is greater: 15 or 11?

    1. 11
    2. 15

  8. Write the number with 5 tens and 7 ones.

  9. 4 tens and 3 ones make what number?

  10. Choose the symbol: 74 □ 41

    1. <
    2. =
    3. >
Answer key
  1. 61 6×10+1=61
  2. > 90 > 27
  3. 16 16 is greater.
  4. 99 9 × 10 + 9 = 99
  5. 69 6×10+9=69
  6. > 69 > 36
  7. 15 15 is greater.
  8. 57 5 × 10 + 7 = 57
  9. 43 4×10+3=43
  10. > 74 > 41
Review worksheet: 10 questions

  1. Which number is greater: 0 or 11?

    1. 0
    2. 11

  2. Choose the symbol: 52 □ 20

    1. >
    2. =
    3. <

  3. 9 tens and 2 ones make what number?

  4. Write the number with 4 tens and 8 ones.

  5. Which number is greater: 17 or 19?

    1. 17
    2. 19

  6. Choose the symbol: 19 □ 53

    1. >
    2. <
    3. =

  7. 6 tens and 6 ones make what number?

  8. Write the number with 4 tens and 7 ones.

  9. Which number is greater: 11 or 2?

    1. 2
    2. 11

  10. Choose the symbol: 48 □ 39

    1. =
    2. <
    3. >
Answer key
  1. 11 11 is greater.
  2. > 52 > 20
  3. 92 9×10+2=92
  4. 48 4 × 10 + 8 = 48
  5. 19 19 is greater.
  6. < 19 < 53
  7. 66 6×10+6=66
  8. 47 4 × 10 + 7 = 47
  9. 11 11 is greater.
  10. > 48 > 39

Related ready-made worksheets: Grade 1 Number skills worksheet

04

1.NBT Number and Operations in Base Ten

Counting patterns

Missing numbers in a sequence.

Short lesson: Describe and extend a pattern

Study guide for Kindergarten to Grade 1: 4 key ideas, including repeat unit, extend and more than one rule; 2 worked examples and 3 practice questions. Say which part repeats before predicting the next item.

  • Repeat unit. Find the smallest block that repeats in a repeating pattern.
  • Extend. Continue the same rule rather than choosing a favorite color or shape.
  • More than one rule. A short sequence can fit several possible rules. State the rule you are using.
  • Explain. Use words, objects or a drawing to show your reasoning; an adult can read the instructions.

Worked example

Continue this stated repeating pattern: red, blue, red, blue, __.

The two-color unit is red then blue.

Answer: red

Read the full study guide

Worksheets

A practice worksheet and a review worksheet, 10 and 10 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 10 questions

  1. 19, 20, □, 22, 23

  2. 11, 12, □, 14, 15

  3. 16, 17, □, 19, 20

  4. 36, 37, □, 39, 40

  5. 73, 74, □, 76, 77

  6. 84, 85, □, 87, 88

  7. 28, 29, □, 31, 32

  8. 74, 75, □, 77, 78

  9. 34, 35, □, 37, 38

  10. 37, 38, □, 40, 41

Answer key
  1. 21 20 + 1 = 21
  2. 13 12 + 1 = 13
  3. 18 17 + 1 = 18
  4. 38 37 + 1 = 38
  5. 75 74 + 1 = 75
  6. 86 85 + 1 = 86
  7. 30 29 + 1 = 30
  8. 76 75 + 1 = 76
  9. 36 35 + 1 = 36
  10. 39 38 + 1 = 39
Review worksheet: 10 questions

  1. 72, 73, □, 75, 76

  2. 24, 25, □, 27, 28

  3. 1, 2, □, 4, 5

  4. 20, 21, □, 23, 24

  5. 4, 5, □, 7, 8

  6. 26, 27, □, 29, 30

  7. 80, 81, □, 83, 84

  8. 55, 56, □, 58, 59

  9. 52, 53, □, 55, 56

  10. 18, 19, □, 21, 22

Answer key
  1. 74 73 + 1 = 74
  2. 26 25 + 1 = 26
  3. 3 2 + 1 = 3
  4. 22 21 + 1 = 22
  5. 6 5 + 1 = 6
  6. 28 27 + 1 = 28
  7. 82 81 + 1 = 82
  8. 57 56 + 1 = 57
  9. 54 53 + 1 = 54
  10. 20 19 + 1 = 20

Related ready-made worksheets: Grade 1 Patterns (Early learning) worksheet

05

1.MD Measurement and Data

Measurement & time

Adding lengths, comparing lengths, telling time to the hour and telling time to the half hour.

Short lesson: Time and length

Read a clock from its hands, and compare or add lengths measured in the same unit.

  • The hour hand. The short hand points to the hour.
  • The minute hand. When the long hand points to 12 it is o’clock. When it points to 6 it is half past.
  • Comparing lengths. To find how much longer one thing is, take the shorter length away from the longer one.
  • Total length. To find a total length, add the lengths together.

Worked example

A ribbon is 5 cm long and another is 3 cm long. How many centimetres longer is the first ribbon?

Take the shorter length from the longer one: 5 take away 3 is 2.

Answer: 2 cm

Worksheets

A practice worksheet and a review worksheet, 10 and 10 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 10 questions

  1. One strip is 12 cm long and another is 13 cm long. What is their total length?

  2. A ribbon is 38 cm long and another is 30 cm long. How many centimetres longer is the first ribbon?

  3. The minute hand points to 6 and the hour hand is halfway after 5. What time is it?

    1. 5:30
    2. 6:30
    3. 6:05
    4. 5:00

  4. A clock's minute hand points to 12 and its hour hand points to 8. What time is it?

    1. 8:30
    2. 8:00
    3. 9:00
    4. 12:08

  5. One strip is 40 cm long and another is 46 cm long. What is their total length?

  6. A ribbon is 49 cm long and another is 48 cm long. How many centimetres longer is the first ribbon?

  7. The minute hand points to 6 and the hour hand is halfway after 11. What time is it?

    1. 12:30
    2. 11:00
    3. 6:11
    4. 11:30

  8. A clock's minute hand points to 12 and its hour hand points to 4. What time is it?

    1. 5:00
    2. 12:04
    3. 4:00
    4. 4:30

  9. One strip is 45 cm long and another is 12 cm long. What is their total length?

  10. A ribbon is 40 cm long and another is 8 cm long. How many centimetres longer is the first ribbon?

Answer key
  1. 25 12+13=25 cm
  2. 8 38−30=8 cm
  3. 5:30 Half past 5 is 5:30.
  4. 8:00 It is 8:00.
  5. 86 40+46=86 cm
  6. 1 49−48=1 cm
  7. 11:30 Half past 11 is 11:30.
  8. 4:00 It is 4:00.
  9. 57 45+12=57 cm
  10. 32 40−8=32 cm
Review worksheet: 10 questions

  1. A ribbon is 8 cm long and another is 7 cm long. How many centimetres longer is the first ribbon?

  2. One strip is 28 cm long and another is 11 cm long. What is their total length?

  3. The minute hand points to 6 and the hour hand is halfway after 1. What time is it?

    1. 2:30
    2. 6:01
    3. 1:00
    4. 1:30

  4. A clock's minute hand points to 12 and its hour hand points to 10. What time is it?

    1. 12:10
    2. 11:00
    3. 10:00
    4. 10:30

  5. A ribbon is 38 cm long and another is 16 cm long. How many centimetres longer is the first ribbon?

  6. One strip is 39 cm long and another is 35 cm long. What is their total length?

  7. The minute hand points to 6 and the hour hand is halfway after 7. What time is it?

    1. 7:30
    2. 6:07
    3. 8:30
    4. 7:00

  8. A clock's minute hand points to 12 and its hour hand points to 9. What time is it?

    1. 9:00
    2. 12:09
    3. 10:00
    4. 9:30

  9. A ribbon is 28 cm long and another is 13 cm long. How many centimetres longer is the first ribbon?

  10. One strip is 16 cm long and another is 25 cm long. What is their total length?

Answer key
  1. 1 8−7=1 cm
  2. 39 28+11=39 cm
  3. 1:30 Half past 1 is 1:30.
  4. 10:00 It is 10:00.
  5. 22 38−16=22 cm
  6. 74 39+35=74 cm
  7. 7:30 Half past 7 is 7:30.
  8. 9:00 It is 9:00.
  9. 15 28−13=15 cm
  10. 41 16+25=41 cm

Related ready-made worksheets: Grade 1 Measurement & time worksheet

06

1.MD Measurement and Data

Data

Reading data tables, comparing data in charts and reading picture graphs.

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, 10 and 10 questions.

Worksheets (PDF)Answer keys (PDF)
Practice worksheet: 10 questions

  1. A chart shows 20 apples and 2 oranges. How many more apples than oranges?

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

  3. A class chart shows 4 cat votes and 4 dog votes. How many votes altogether?

  4. A chart shows 7 apples and 3 oranges. How many more apples than oranges?

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

  6. A class chart shows 6 cat votes and 11 dog votes. How many votes altogether?

  7. A chart shows 20 apples and 12 oranges. How many more apples than oranges?

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

  9. A class chart shows 11 cat votes and 9 dog votes. How many votes altogether?

  10. A chart shows 15 apples and 13 oranges. How many more apples than oranges?

Answer key
  1. 18 20−2=18
  2. 28 12 + 4 + 12 = 28
  3. 8 4+4=8
  4. 4 7−3=4
  5. 13 2 + 2 + 9 = 13
  6. 17 6+11=17
  7. 8 20−12=8
  8. 16 12 + 3 + 1 = 16
  9. 20 11+9=20
  10. 2 15−13=2
Review worksheet: 10 questions

  1. A class counts blocks: red 7, blue 4, yellow 3. How many blocks in all?

  2. A class chart shows 2 cat votes and 9 dog votes. How many votes altogether?

  3. A chart shows 5 apples and 4 oranges. How many more apples than oranges?

  4. A class counts blocks: red 6, blue 8, yellow 2. How many blocks in all?

  5. A class chart shows 6 cat votes and 4 dog votes. How many votes altogether?

  6. A chart shows 20 apples and 6 oranges. How many more apples than oranges?

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

  8. A class chart shows 2 cat votes and 8 dog votes. How many votes altogether?

  9. A chart shows 15 apples and 8 oranges. How many more apples than oranges?

  10. A class counts blocks: red 4, blue 10, yellow 11. How many blocks in all?

Answer key
  1. 14 7 + 4 + 3 = 14
  2. 11 2+9=11
  3. 1 5−4=1
  4. 16 6 + 8 + 2 = 16
  5. 10 6+4=10
  6. 14 20−6=14
  7. 21 8 + 8 + 5 = 21
  8. 10 2+8=10
  9. 7 15−8=7
  10. 25 4 + 10 + 11 = 25

Related ready-made worksheets: Grade 1 Statistics & probability worksheet