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Computer science · Grades 2–4

Robot moves on a grid

Study guide for Grades 2 to 4: 2 worked examples and 2 practice questions. Trace the path one arrow at a time. Columns change with ← and →; rows change with ↑ and ↓.

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Rule and key idea

Trace the path one arrow at a time. Columns change with ← and →; rows change with ↑ and ↓.

↑ row + 1 · ↓ row − 1 · → next column · ← previous column

Worked examples

A robot is on square D2 of a grid. Columns A to E go from left to right; rows 1 to 5 go from bottom to top. Each arrow moves it one square: ← ↓. Which square does it end on?

Start at D2, follow ← ↓, end at C1.

C1

A robot is on square C1 of a grid. Columns A to E go from left to right; rows 1 to 5 go from bottom to top. Each arrow moves it one square: ← → ↑. Which square does it end on?

Start at C1, follow ← → ↑, end at C2.

C2

Try two questions

  1. A robot is on square E4 of a grid. Columns A to E go from left to right; rows 1 to 5 go from bottom to top. Each arrow moves it one square: ↓ ↓ ↑. Which square does it end on?

    1. E2
    2. D3
    3. E4
    4. E3

  2. A robot is on square E4 of a grid. Columns A to E go from left to right; rows 1 to 5 go from bottom to top. Each arrow moves it one square: ↑ ↓ ↑. Which square does it end on?

    1. D4
    2. E4
    3. D5
    4. E5

Answers and reasoning

Answers and marking notes
  1. E3

    Start at E4, follow ↓ ↓ ↑, end at E3.

  2. E5

    Start at E4, follow ↑ ↓ ↑, end at E5.

How this page was made: written for StudyBrix with AI assistance from our own templates. Answers and worked examples are checked by automated tests, and grade bands are approximate, not an official curriculum alignment. See the editorial policy for corrections. Editorial policy