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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 829 · 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. 2.17² =
  3. 3.29² =
  4. 4.23² =
  5. 5.13² =
  6. 6.28² =
  7. 7.21² =
  8. 8.11² =
  9. 9.16² =
  10. 10.24² =
  11. 11.22² =
  12. 12.27² =
  13. 13.15² =
  14. 14.26² =
  15. 15.14² =
  16. 16.25² =
  17. 17.15² =
  18. 18.19² =
  19. 19.18² =
  20. 20.22² =
  21. 21.28² =
  22. 22.25² =
  23. 23.21² =
  24. 24.17² =
  25. 25.25² =
  26. 26.29² =
  27. 27.18² =
  28. 28.11² =
  29. 29.13² =
  30. 30.12² =
  31. 31.29² =
  32. 32.25² =
  33. 33.22² =
  34. 34.13² =
  35. 35.29² =
  36. 36.15² =
  37. 37.28² =
  38. 38.25² =
  39. 39.26² =
  40. 40.23² =

Answer key

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

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