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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 165 · 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. 1.18² =
  2. 2.24² =
  3. 3.27² =
  4. 4.14² =
  5. 5.21² =
  6. 6.29² =
  7. 7.15² =
  8. 8.13² =
  9. 9.26² =
  10. 10.22² =
  11. 11.12² =
  12. 12.16² =
  13. 13.11² =
  14. 14.11² =
  15. 15.19² =
  16. 16.25² =
  17. 17.17² =
  18. 18.17² =
  19. 19.23² =
  20. 20.24² =
  21. 21.14² =
  22. 22.28² =
  23. 23.18² =
  24. 24.12² =
  25. 25.21² =
  26. 26.13² =
  27. 27.21² =
  28. 28.19² =
  29. 29.28² =
  30. 30.16² =
  31. 31.28² =
  32. 32.28² =
  33. 33.12² =
  34. 34.13² =
  35. 35.13² =
  36. 36.22² =
  37. 37.29² =
  38. 38.15² =
  39. 39.13² =
  40. 40.17² =

Answer key

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

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