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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 701 · 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. 1.18² =
  2. 2.16² =
  3. 3.12² =
  4. 4.19² =
  5. 5.13² =
  6. 6.22² =
  7. 7.29² =
  8. 8.27² =
  9. 9.15² =
  10. 10.23² =
  11. 11.26² =
  12. 12.24² =
  13. 13.11² =
  14. 14.25² =
  15. 15.21² =
  16. 16.14² =
  17. 17.28² =
  18. 18.24² =
  19. 19.17² =
  20. 20.27² =
  21. 21.18² =
  22. 22.15² =
  23. 23.15² =
  24. 24.15² =
  25. 25.29² =
  26. 26.23² =
  27. 27.28² =
  28. 28.25² =
  29. 29.15² =
  30. 30.22² =
  31. 31.11² =
  32. 32.23² =
  33. 33.12² =
  34. 34.15² =
  35. 35.23² =
  36. 36.28² =
  37. 37.28² =
  38. 38.28² =
  39. 39.28² =
  40. 40.23² =

Answer key

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

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