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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 637 · 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. 1.15² =
  2. 2.27² =
  3. 3.18² =
  4. 4.24² =
  5. 5.26² =
  6. 6.12² =
  7. 7.28² =
  8. 8.17² =
  9. 9.25² =
  10. 10.23² =
  11. 11.11² =
  12. 12.16² =
  13. 13.21² =
  14. 14.19² =
  15. 15.22² =
  16. 16.14² =
  17. 17.13² =
  18. 18.22² =
  19. 19.29² =
  20. 20.17² =
  21. 21.24² =
  22. 22.11² =
  23. 23.18² =
  24. 24.13² =
  25. 25.13² =
  26. 26.19² =
  27. 27.22² =
  28. 28.19² =
  29. 29.12² =
  30. 30.23² =
  31. 31.16² =
  32. 32.16² =
  33. 33.28² =
  34. 34.12² =
  35. 35.28² =
  36. 36.27² =
  37. 37.23² =
  38. 38.13² =
  39. 39.11² =
  40. 40.23² =

Answer key

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

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