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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 679 · 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. 1.12² =
  2. 2.28² =
  3. 3.13² =
  4. 4.18² =
  5. 5.25² =
  6. 6.29² =
  7. 7.22² =
  8. 8.16² =
  9. 9.24² =
  10. 10.26² =
  11. 11.21² =
  12. 12.15² =
  13. 13.17² =
  14. 14.23² =
  15. 15.14² =
  16. 16.26² =
  17. 17.11² =
  18. 18.19² =
  19. 19.18² =
  20. 20.27² =
  21. 21.15² =
  22. 22.23² =
  23. 23.19² =
  24. 24.22² =
  25. 25.18² =
  26. 26.15² =
  27. 27.19² =
  28. 28.28² =
  29. 29.28² =
  30. 30.26² =
  31. 31.29² =
  32. 32.11² =
  33. 33.28² =
  34. 34.15² =
  35. 35.24² =
  36. 36.26² =
  37. 37.18² =
  38. 38.15² =
  39. 39.25² =
  40. 40.28² =

Answer key

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

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