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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 792 · 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. 1.26² =
  2. 2.24² =
  3. 3.27² =
  4. 4.11² =
  5. 5.22² =
  6. 6.23² =
  7. 7.21² =
  8. 8.19² =
  9. 9.16² =
  10. 10.18² =
  11. 11.12² =
  12. 12.25² =
  13. 13.13² =
  14. 14.28² =
  15. 15.29² =
  16. 16.17² =
  17. 17.15² =
  18. 18.15² =
  19. 19.14² =
  20. 20.26² =
  21. 21.23² =
  22. 22.11² =
  23. 23.28² =
  24. 24.15² =
  25. 25.26² =
  26. 26.28² =
  27. 27.18² =
  28. 28.18² =
  29. 29.16² =
  30. 30.24² =
  31. 31.17² =
  32. 32.16² =
  33. 33.18² =
  34. 34.19² =
  35. 35.21² =
  36. 36.12² =
  37. 37.22² =
  38. 38.22² =
  39. 39.26² =
  40. 40.21² =

Answer key

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

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