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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 759 · 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. 1.22² =
  2. 2.12² =
  3. 3.29² =
  4. 4.11² =
  5. 5.15² =
  6. 6.27² =
  7. 7.17² =
  8. 8.21² =
  9. 9.28² =
  10. 10.23² =
  11. 11.19² =
  12. 12.13² =
  13. 13.14² =
  14. 14.25² =
  15. 15.16² =
  16. 16.26² =
  17. 17.15² =
  18. 18.24² =
  19. 19.12² =
  20. 20.15² =
  21. 21.18² =
  22. 22.11² =
  23. 23.21² =
  24. 24.12² =
  25. 25.26² =
  26. 26.19² =
  27. 27.14² =
  28. 28.28² =
  29. 29.21² =
  30. 30.29² =
  31. 31.22² =
  32. 32.16² =
  33. 33.14² =
  34. 34.26² =
  35. 35.12² =
  36. 36.13² =
  37. 37.15² =
  38. 38.26² =
  39. 39.26² =
  40. 40.17² =

Answer key

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

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