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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 636 · 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. 1.24² =
  2. 2.27² =
  3. 3.29² =
  4. 4.14² =
  5. 5.21² =
  6. 6.18² =
  7. 7.15² =
  8. 8.19² =
  9. 9.16² =
  10. 10.17² =
  11. 11.25² =
  12. 12.22² =
  13. 13.26² =
  14. 14.12² =
  15. 15.11² =
  16. 16.28² =
  17. 17.13² =
  18. 18.23² =
  19. 19.13² =
  20. 20.12² =
  21. 21.19² =
  22. 22.15² =
  23. 23.26² =
  24. 24.16² =
  25. 25.28² =
  26. 26.11² =
  27. 27.25² =
  28. 28.24² =
  29. 29.28² =
  30. 30.23² =
  31. 31.17² =
  32. 32.22² =
  33. 33.16² =
  34. 34.23² =
  35. 35.29² =
  36. 36.28² =
  37. 37.16² =
  38. 38.11² =
  39. 39.24² =
  40. 40.25² =

Answer key

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

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