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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 643 · 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. 1.27² =
  2. 2.28² =
  3. 3.24² =
  4. 4.21² =
  5. 5.13² =
  6. 6.15² =
  7. 7.23² =
  8. 8.14² =
  9. 9.18² =
  10. 10.25² =
  11. 11.17² =
  12. 12.11² =
  13. 13.19² =
  14. 14.12² =
  15. 15.22² =
  16. 16.29² =
  17. 17.26² =
  18. 18.16² =
  19. 19.11² =
  20. 20.12² =
  21. 21.13² =
  22. 22.29² =
  23. 23.28² =
  24. 24.29² =
  25. 25.14² =
  26. 26.22² =
  27. 27.27² =
  28. 28.13² =
  29. 29.24² =
  30. 30.26² =
  31. 31.22² =
  32. 32.14² =
  33. 33.21² =
  34. 34.15² =
  35. 35.23² =
  36. 36.26² =
  37. 37.21² =
  38. 38.28² =
  39. 39.15² =
  40. 40.16² =

Answer key

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

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