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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 886 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.21² =
  2. 2.25² =
  3. 3.27² =
  4. 4.22² =
  5. 5.26² =
  6. 6.11² =
  7. 7.13² =
  8. 8.18² =
  9. 9.15² =
  10. 10.14² =
  11. 11.23² =
  12. 12.19² =
  13. 13.12² =
  14. 14.28² =
  15. 15.24² =
  16. 16.16² =
  17. 17.29² =
  18. 18.24² =
  19. 19.17² =
  20. 20.29² =
  21. 21.22² =
  22. 22.13² =
  23. 23.15² =
  24. 24.27² =
  25. 25.16² =
  26. 26.15² =
  27. 27.16² =
  28. 28.21² =
  29. 29.17² =
  30. 30.25² =
  31. 31.17² =
  32. 32.12² =
  33. 33.15² =
  34. 34.13² =
  35. 35.24² =
  36. 36.13² =
  37. 37.18² =
  38. 38.19² =
  39. 39.13² =
  40. 40.27² =

Answer key

  1. 441
  2. 625
  3. 729
  4. 484
  5. 676
  6. 121
  7. 169
  8. 324
  9. 225
  10. 196
  11. 529
  12. 361
  13. 144
  14. 784
  15. 576
  16. 256
  17. 841
  18. 576
  19. 289
  20. 841
  21. 484
  22. 169
  23. 225
  24. 729
  25. 256
  26. 225
  27. 256
  28. 441
  29. 289
  30. 625
  31. 289
  32. 144
  33. 225
  34. 169
  35. 576
  36. 169
  37. 324
  38. 361
  39. 169
  40. 729

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