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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 714 · 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. 2.16² =
  3. 3.29² =
  4. 4.12² =
  5. 5.28² =
  6. 6.19² =
  7. 7.22² =
  8. 8.24² =
  9. 9.13² =
  10. 10.11² =
  11. 11.25² =
  12. 12.17² =
  13. 13.15² =
  14. 14.26² =
  15. 15.18² =
  16. 16.14² =
  17. 17.21² =
  18. 18.27² =
  19. 19.26² =
  20. 20.24² =
  21. 21.12² =
  22. 22.15² =
  23. 23.28² =
  24. 24.12² =
  25. 25.28² =
  26. 26.26² =
  27. 27.18² =
  28. 28.23² =
  29. 29.23² =
  30. 30.12² =
  31. 31.14² =
  32. 32.19² =
  33. 33.15² =
  34. 34.26² =
  35. 35.19² =
  36. 36.26² =
  37. 37.27² =
  38. 38.14² =
  39. 39.12² =
  40. 40.15² =

Answer key

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

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