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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 284 · 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. 1.23² =
  2. 2.24² =
  3. 3.26² =
  4. 4.16² =
  5. 5.12² =
  6. 6.18² =
  7. 7.28² =
  8. 8.21² =
  9. 9.15² =
  10. 10.13² =
  11. 11.14² =
  12. 12.23² =
  13. 13.27² =
  14. 14.19² =
  15. 15.11² =
  16. 16.25² =
  17. 17.17² =
  18. 18.22² =
  19. 19.29² =
  20. 20.27² =
  21. 21.22² =
  22. 22.16² =
  23. 23.15² =
  24. 24.12² =
  25. 25.23² =
  26. 26.15² =
  27. 27.15² =
  28. 28.29² =
  29. 29.15² =
  30. 30.28² =
  31. 31.16² =
  32. 32.23² =
  33. 33.29² =
  34. 34.12² =
  35. 35.13² =
  36. 36.11² =
  37. 37.17² =
  38. 38.18² =
  39. 39.21² =
  40. 40.13² =

Answer key

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

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