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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 17 squared (17²)?
2. What is the positive square root of 324 (√324)?
3. What is 12 squared (12²)?
4. What is 2 squared (2²)?
5. What is 10 squared (10²)?
6. What is the positive square root of 169 (√169)?
7. What is 18 squared (18²)?
8. What is the positive square root of 49 (√49)?
9. What is 13 squared (13²)?
10. What is 5 squared (5²)?
11. What is 4 squared (4²)?
12. What is the positive square root of 400 (√400)?
12 questions · Seed 104731 · 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 17 squared (17²)?
28917² means 17 × 17 = 289.
2. What is the positive square root of 324 (√324)?
18Since 18 × 18 = 324, √324 = 18.
3. What is 12 squared (12²)?
14412² means 12 × 12 = 144.
4. What is 2 squared (2²)?
5. What is 10 squared (10²)?
10010² means 10 × 10 = 100.
6. What is the positive square root of 169 (√169)?
13Since 13 × 13 = 169, √169 = 13.
7. What is 18 squared (18²)?
32418² means 18 × 18 = 324.
8. What is the positive square root of 49 (√49)?
7Since 7 × 7 = 49, √49 = 7.
9. What is 13 squared (13²)?
16913² means 13 × 13 = 169.
10. What is 5 squared (5²)?
11. What is 4 squared (4²)?
12. What is the positive square root of 400 (√400)?
20Since 20 × 20 = 400, √400 = 20.
12 questions · Seed 104731 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 7-9
Square numbers & square roots
Take your time. Show your thinking.
1. What is 17 squared (17²)?
2. What is the positive square root of 324 (√324)?
3. What is 12 squared (12²)?
4. What is 2 squared (2²)?
5. What is 10 squared (10²)?
6. What is the positive square root of 169 (√169)?
7. What is 18 squared (18²)?
8. What is the positive square root of 49 (√49)?
9. What is 13 squared (13²)?
10. What is 5 squared (5²)?
11. What is 4 squared (4²)?
12. What is the positive square root of 400 (√400)?
12 questions · Seed 104731 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 7-9
Square numbers & square roots
Answers and reasoning. Review before teaching.
1. What is 17 squared (17²)?
28917² means 17 × 17 = 289.
2. What is the positive square root of 324 (√324)?
18Since 18 × 18 = 324, √324 = 18.
3. What is 12 squared (12²)?
14412² means 12 × 12 = 144.
4. What is 2 squared (2²)?
5. What is 10 squared (10²)?
10010² means 10 × 10 = 100.
6. What is the positive square root of 169 (√169)?
13Since 13 × 13 = 169, √169 = 13.
7. What is 18 squared (18²)?
32418² means 18 × 18 = 324.
8. What is the positive square root of 49 (√49)?
7Since 7 × 7 = 49, √49 = 7.
9. What is 13 squared (13²)?
16913² means 13 × 13 = 169.
10. What is 5 squared (5²)?
11. What is 4 squared (4²)?
12. What is the positive square root of 400 (√400)?
20Since 20 × 20 = 400, √400 = 20.
12 questions · Seed 104731 · Age guidance, not curriculum certification