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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 330 · 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. 1.13² =
  2. 2.29² =
  3. 3.11² =
  4. 4.27² =
  5. 5.24² =
  6. 6.14² =
  7. 7.28² =
  8. 8.21² =
  9. 9.23² =
  10. 10.17² =
  11. 11.19² =
  12. 12.15² =
  13. 13.26² =
  14. 14.16² =
  15. 15.18² =
  16. 16.22² =
  17. 17.25² =
  18. 18.11² =
  19. 19.18² =
  20. 20.12² =
  21. 21.18² =
  22. 22.11² =
  23. 23.16² =
  24. 24.29² =
  25. 25.17² =
  26. 26.26² =
  27. 27.18² =
  28. 28.25² =
  29. 29.22² =
  30. 30.28² =
  31. 31.13² =
  32. 32.12² =
  33. 33.25² =
  34. 34.12² =
  35. 35.13² =
  36. 36.15² =
  37. 37.25² =
  38. 38.28² =
  39. 39.23² =
  40. 40.16² =

Answer key

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

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