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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 106 · 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. 1.17² =
  2. 2.28² =
  3. 3.18² =
  4. 4.25² =
  5. 5.11² =
  6. 6.21² =
  7. 7.26² =
  8. 8.29² =
  9. 9.22² =
  10. 10.27² =
  11. 11.24² =
  12. 12.19² =
  13. 13.12² =
  14. 14.23² =
  15. 15.15² =
  16. 16.14² =
  17. 17.16² =
  18. 18.24² =
  19. 19.28² =
  20. 20.14² =
  21. 21.13² =
  22. 22.18² =
  23. 23.17² =
  24. 24.22² =
  25. 25.12² =
  26. 26.17² =
  27. 27.12² =
  28. 28.16² =
  29. 29.16² =
  30. 30.15² =
  31. 31.18² =
  32. 32.18² =
  33. 33.18² =
  34. 34.15² =
  35. 35.17² =
  36. 36.13² =
  37. 37.26² =
  38. 38.11² =
  39. 39.22² =
  40. 40.24² =

Answer key

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

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