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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 240 · 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. 1.27² =
  2. 2.14² =
  3. 3.17² =
  4. 4.18² =
  5. 5.22² =
  6. 6.28² =
  7. 7.15² =
  8. 8.16² =
  9. 9.11² =
  10. 10.24² =
  11. 11.25² =
  12. 12.21² =
  13. 13.12² =
  14. 14.13² =
  15. 15.29² =
  16. 16.26² =
  17. 17.19² =
  18. 18.23² =
  19. 19.17² =
  20. 20.21² =
  21. 21.23² =
  22. 22.14² =
  23. 23.25² =
  24. 24.22² =
  25. 25.27² =
  26. 26.24² =
  27. 27.24² =
  28. 28.11² =
  29. 29.28² =
  30. 30.18² =
  31. 31.18² =
  32. 32.15² =
  33. 33.11² =
  34. 34.19² =
  35. 35.15² =
  36. 36.16² =
  37. 37.26² =
  38. 38.18² =
  39. 39.18² =
  40. 40.28² =

Answer key

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

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