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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 464 · 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. 1.21² =
  2. 2.27² =
  3. 3.16² =
  4. 4.13² =
  5. 5.25² =
  6. 6.23² =
  7. 7.19² =
  8. 8.14² =
  9. 9.29² =
  10. 10.26² =
  11. 11.28² =
  12. 12.12² =
  13. 13.17² =
  14. 14.11² =
  15. 15.15² =
  16. 16.18² =
  17. 17.15² =
  18. 18.22² =
  19. 19.24² =
  20. 20.16² =
  21. 21.22² =
  22. 22.15² =
  23. 23.17² =
  24. 24.23² =
  25. 25.28² =
  26. 26.12² =
  27. 27.16² =
  28. 28.19² =
  29. 29.15² =
  30. 30.28² =
  31. 31.29² =
  32. 32.24² =
  33. 33.14² =
  34. 34.11² =
  35. 35.14² =
  36. 36.18² =
  37. 37.14² =
  38. 38.18² =
  39. 39.29² =
  40. 40.22² =

Answer key

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

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