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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 872 · 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. 2.28² =
  3. 3.29² =
  4. 4.18² =
  5. 5.21² =
  6. 6.25² =
  7. 7.27² =
  8. 8.19² =
  9. 9.24² =
  10. 10.17² =
  11. 11.22² =
  12. 12.16² =
  13. 13.14² =
  14. 14.11² =
  15. 15.13² =
  16. 16.12² =
  17. 17.15² =
  18. 18.23² =
  19. 19.17² =
  20. 20.13² =
  21. 21.18² =
  22. 22.28² =
  23. 23.24² =
  24. 24.26² =
  25. 25.24² =
  26. 26.18² =
  27. 27.13² =
  28. 28.11² =
  29. 29.19² =
  30. 30.22² =
  31. 31.11² =
  32. 32.22² =
  33. 33.28² =
  34. 34.18² =
  35. 35.17² =
  36. 36.21² =
  37. 37.19² =
  38. 38.24² =
  39. 39.15² =
  40. 40.13² =

Answer key

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

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