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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 542 · 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. 2.23² =
  3. 3.24² =
  4. 4.11² =
  5. 5.15² =
  6. 6.17² =
  7. 7.16² =
  8. 8.25² =
  9. 9.18² =
  10. 10.19² =
  11. 11.28² =
  12. 12.13² =
  13. 13.14² =
  14. 14.21² =
  15. 15.22² =
  16. 16.29² =
  17. 17.22² =
  18. 18.27² =
  19. 19.19² =
  20. 20.17² =
  21. 21.12² =
  22. 22.13² =
  23. 23.27² =
  24. 24.13² =
  25. 25.24² =
  26. 26.26² =
  27. 27.11² =
  28. 28.26² =
  29. 29.12² =
  30. 30.28² =
  31. 31.28² =
  32. 32.16² =
  33. 33.15² =
  34. 34.17² =
  35. 35.16² =
  36. 36.22² =
  37. 37.14² =
  38. 38.15² =
  39. 39.28² =
  40. 40.15² =

Answer key

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

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