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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 446 · 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. 3.12² =
  4. 4.21² =
  5. 5.22² =
  6. 6.26² =
  7. 7.17² =
  8. 8.15² =
  9. 9.13² =
  10. 10.14² =
  11. 11.29² =
  12. 12.19² =
  13. 13.24² =
  14. 14.25² =
  15. 15.11² =
  16. 16.28² =
  17. 17.27² =
  18. 18.18² =
  19. 19.27² =
  20. 20.25² =
  21. 21.27² =
  22. 22.21² =
  23. 23.24² =
  24. 24.28² =
  25. 25.26² =
  26. 26.18² =
  27. 27.21² =
  28. 28.28² =
  29. 29.13² =
  30. 30.15² =
  31. 31.17² =
  32. 32.28² =
  33. 33.21² =
  34. 34.15² =
  35. 35.26² =
  36. 36.24² =
  37. 37.21² =
  38. 38.29² =
  39. 39.26² =
  40. 40.22² =

Answer key

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

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