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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 529 · 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. 2.12² =
  3. 3.29² =
  4. 4.19² =
  5. 5.25² =
  6. 6.23² =
  7. 7.18² =
  8. 8.24² =
  9. 9.16² =
  10. 10.21² =
  11. 11.11² =
  12. 12.15² =
  13. 13.13² =
  14. 14.26² =
  15. 15.22² =
  16. 16.14² =
  17. 17.28² =
  18. 18.25² =
  19. 19.26² =
  20. 20.17² =
  21. 21.17² =
  22. 22.28² =
  23. 23.27² =
  24. 24.17² =
  25. 25.13² =
  26. 26.13² =
  27. 27.29² =
  28. 28.25² =
  29. 29.29² =
  30. 30.15² =
  31. 31.24² =
  32. 32.14² =
  33. 33.23² =
  34. 34.12² =
  35. 35.16² =
  36. 36.23² =
  37. 37.21² =
  38. 38.28² =
  39. 39.24² =
  40. 40.19² =

Answer key

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

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