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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 507 · 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. 1.12² =
  2. 2.16² =
  3. 3.22² =
  4. 4.11² =
  5. 5.25² =
  6. 6.24² =
  7. 7.21² =
  8. 8.27² =
  9. 9.26² =
  10. 10.17² =
  11. 11.15² =
  12. 12.23² =
  13. 13.13² =
  14. 14.29² =
  15. 15.19² =
  16. 16.28² =
  17. 17.18² =
  18. 18.14² =
  19. 19.27² =
  20. 20.23² =
  21. 21.17² =
  22. 22.19² =
  23. 23.26² =
  24. 24.29² =
  25. 25.12² =
  26. 26.21² =
  27. 27.13² =
  28. 28.12² =
  29. 29.15² =
  30. 30.23² =
  31. 31.15² =
  32. 32.13² =
  33. 33.21² =
  34. 34.11² =
  35. 35.29² =
  36. 36.22² =
  37. 37.13² =
  38. 38.22² =
  39. 39.22² =
  40. 40.22² =

Answer key

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

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