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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 807 · 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. 1.23² =
  2. 2.27² =
  3. 3.21² =
  4. 4.22² =
  5. 5.19² =
  6. 6.25² =
  7. 7.12² =
  8. 8.16² =
  9. 9.14² =
  10. 10.13² =
  11. 11.29² =
  12. 12.17² =
  13. 13.24² =
  14. 14.11² =
  15. 15.28² =
  16. 16.26² =
  17. 17.15² =
  18. 18.18² =
  19. 19.25² =
  20. 20.29² =
  21. 21.24² =
  22. 22.23² =
  23. 23.13² =
  24. 24.21² =
  25. 25.24² =
  26. 26.22² =
  27. 27.28² =
  28. 28.12² =
  29. 29.28² =
  30. 30.28² =
  31. 31.21² =
  32. 32.15² =
  33. 33.27² =
  34. 34.11² =
  35. 35.13² =
  36. 36.26² =
  37. 37.22² =
  38. 38.14² =
  39. 39.18² =
  40. 40.17² =

Answer key

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

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