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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 832 · 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. 1.28² =
  2. 2.29² =
  3. 3.24² =
  4. 4.16² =
  5. 5.21² =
  6. 6.11² =
  7. 7.23² =
  8. 8.13² =
  9. 9.25² =
  10. 10.17² =
  11. 11.12² =
  12. 12.18² =
  13. 13.14² =
  14. 14.27² =
  15. 15.11² =
  16. 16.25² =
  17. 17.19² =
  18. 18.26² =
  19. 19.15² =
  20. 20.15² =
  21. 21.18² =
  22. 22.22² =
  23. 23.18² =
  24. 24.11² =
  25. 25.17² =
  26. 26.11² =
  27. 27.14² =
  28. 28.26² =
  29. 29.11² =
  30. 30.12² =
  31. 31.13² =
  32. 32.14² =
  33. 33.22² =
  34. 34.13² =
  35. 35.12² =
  36. 36.21² =
  37. 37.13² =
  38. 38.15² =
  39. 39.14² =
  40. 40.14² =

Answer key

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

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