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Square numbers & square roots
Evaluate whole-number squares (n²) and find exact positive square roots (√n). Review suitability for your learners before teaching.
Worksheet StudioPractice pack · Ages 7-9
Square numbers & square roots
Take your time. Show your thinking.
1. What is the positive square root of 64 (√64)?
2. What is 5 squared (5²)?
3. What is the positive square root of 81 (√81)?
4. What is the positive square root of 361 (√361)?
5. What is 10 squared (10²)?
6. What is the positive square root of 36 (√36)?
7. What is the positive square root of 256 (√256)?
8. What is the positive square root of 289 (√289)?
9. What is 4 squared (4²)?
10. What is 13 squared (13²)?
11. What is the positive square root of 49 (√49)?
12. What is 17 squared (17²)?
12 questions · Seed 49 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 7-9
Square numbers & square roots
Answers and reasoning. Review before teaching.
1. What is the positive square root of 64 (√64)?
8Since 8 × 8 = 64, √64 = 8.
2. What is 5 squared (5²)?
3. What is the positive square root of 81 (√81)?
9Since 9 × 9 = 81, √81 = 9.
4. What is the positive square root of 361 (√361)?
19Since 19 × 19 = 361, √361 = 19.
5. What is 10 squared (10²)?
10010² means 10 × 10 = 100.
6. What is the positive square root of 36 (√36)?
6Since 6 × 6 = 36, √36 = 6.
7. What is the positive square root of 256 (√256)?
16Since 16 × 16 = 256, √256 = 16.
8. What is the positive square root of 289 (√289)?
17Since 17 × 17 = 289, √289 = 17.
9. What is 4 squared (4²)?
10. What is 13 squared (13²)?
16913² means 13 × 13 = 169.
11. What is the positive square root of 49 (√49)?
7Since 7 × 7 = 49, √49 = 7.
12. What is 17 squared (17²)?
28917² means 17 × 17 = 289.
12 questions · Seed 49 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Square numbers & square roots
Take your time. Show your thinking.
1. What is the positive square root of 64 (√64)?
2. What is 5 squared (5²)?
3. What is the positive square root of 81 (√81)?
4. What is the positive square root of 361 (√361)?
5. What is 10 squared (10²)?
6. What is the positive square root of 36 (√36)?
7. What is the positive square root of 256 (√256)?
8. What is the positive square root of 289 (√289)?
9. What is 4 squared (4²)?
10. What is 13 squared (13²)?
11. What is the positive square root of 49 (√49)?
12. What is 17 squared (17²)?
12 questions · Seed 49 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Square numbers & square roots
Answers and reasoning. Review before teaching.
1. What is the positive square root of 64 (√64)?
8Since 8 × 8 = 64, √64 = 8.
2. What is 5 squared (5²)?
3. What is the positive square root of 81 (√81)?
9Since 9 × 9 = 81, √81 = 9.
4. What is the positive square root of 361 (√361)?
19Since 19 × 19 = 361, √361 = 19.
5. What is 10 squared (10²)?
10010² means 10 × 10 = 100.
6. What is the positive square root of 36 (√36)?
6Since 6 × 6 = 36, √36 = 6.
7. What is the positive square root of 256 (√256)?
16Since 16 × 16 = 256, √256 = 16.
8. What is the positive square root of 289 (√289)?
17Since 17 × 17 = 289, √289 = 17.
9. What is 4 squared (4²)?
10. What is 13 squared (13²)?
16913² means 13 × 13 = 169.
11. What is the positive square root of 49 (√49)?
7Since 7 × 7 = 49, √49 = 7.
12. What is 17 squared (17²)?
28917² means 17 × 17 = 289.
12 questions · Seed 49 · Age guidance, not curriculum certification