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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 729 · 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. 2.13² =
  3. 3.24² =
  4. 4.27² =
  5. 5.15² =
  6. 6.23² =
  7. 7.26² =
  8. 8.18² =
  9. 9.19² =
  10. 10.17² =
  11. 11.25² =
  12. 12.22² =
  13. 13.21² =
  14. 14.29² =
  15. 15.11² =
  16. 16.12² =
  17. 17.12² =
  18. 18.28² =
  19. 19.16² =
  20. 20.28² =
  21. 21.14² =
  22. 22.17² =
  23. 23.23² =
  24. 24.19² =
  25. 25.28² =
  26. 26.28² =
  27. 27.17² =
  28. 28.27² =
  29. 29.19² =
  30. 30.17² =
  31. 31.25² =
  32. 32.26² =
  33. 33.15² =
  34. 34.22² =
  35. 35.25² =
  36. 36.22² =
  37. 37.16² =
  38. 38.23² =
  39. 39.15² =
  40. 40.17² =

Answer key

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

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