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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 638 · 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. 2.15² =
  3. 3.18² =
  4. 4.22² =
  5. 5.28² =
  6. 6.11² =
  7. 7.21² =
  8. 8.27² =
  9. 9.17² =
  10. 10.25² =
  11. 11.14² =
  12. 12.26² =
  13. 13.19² =
  14. 14.16² =
  15. 15.13² =
  16. 16.24² =
  17. 17.15² =
  18. 18.29² =
  19. 19.23² =
  20. 20.11² =
  21. 21.15² =
  22. 22.12² =
  23. 23.11² =
  24. 24.16² =
  25. 25.24² =
  26. 26.26² =
  27. 27.27² =
  28. 28.13² =
  29. 29.11² =
  30. 30.22² =
  31. 31.14² =
  32. 32.18² =
  33. 33.21² =
  34. 34.15² =
  35. 35.12² =
  36. 36.29² =
  37. 37.29² =
  38. 38.19² =
  39. 39.17² =
  40. 40.18² =

Answer key

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

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