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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 61 · 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. 2.17² =
  3. 3.25² =
  4. 4.21² =
  5. 5.11² =
  6. 6.16² =
  7. 7.28² =
  8. 8.15² =
  9. 9.14² =
  10. 10.23² =
  11. 11.19² =
  12. 12.22² =
  13. 13.12² =
  14. 14.18² =
  15. 15.13² =
  16. 16.26² =
  17. 17.24² =
  18. 18.29² =
  19. 19.17² =
  20. 20.12² =
  21. 21.23² =
  22. 22.25² =
  23. 23.27² =
  24. 24.18² =
  25. 25.28² =
  26. 26.26² =
  27. 27.11² =
  28. 28.13² =
  29. 29.23² =
  30. 30.17² =
  31. 31.19² =
  32. 32.15² =
  33. 33.17² =
  34. 34.14² =
  35. 35.12² =
  36. 36.25² =
  37. 37.15² =
  38. 38.12² =
  39. 39.22² =
  40. 40.17² =

Answer key

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

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