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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 383 · 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. 2.21² =
  3. 3.28² =
  4. 4.27² =
  5. 5.14² =
  6. 6.22² =
  7. 7.15² =
  8. 8.16² =
  9. 9.25² =
  10. 10.17² =
  11. 11.18² =
  12. 12.29² =
  13. 13.11² =
  14. 14.12² =
  15. 15.13² =
  16. 16.24² =
  17. 17.26² =
  18. 18.19² =
  19. 19.12² =
  20. 20.15² =
  21. 21.28² =
  22. 22.22² =
  23. 23.13² =
  24. 24.29² =
  25. 25.16² =
  26. 26.17² =
  27. 27.29² =
  28. 28.27² =
  29. 29.22² =
  30. 30.19² =
  31. 31.11² =
  32. 32.19² =
  33. 33.22² =
  34. 34.13² =
  35. 35.15² =
  36. 36.15² =
  37. 37.26² =
  38. 38.13² =
  39. 39.21² =
  40. 40.13² =

Answer key

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

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