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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 241 · 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. 1.25² =
  2. 2.14² =
  3. 3.18² =
  4. 4.29² =
  5. 5.27² =
  6. 6.21² =
  7. 7.17² =
  8. 8.28² =
  9. 9.23² =
  10. 10.16² =
  11. 11.19² =
  12. 12.13² =
  13. 13.11² =
  14. 14.12² =
  15. 15.22² =
  16. 16.15² =
  17. 17.26² =
  18. 18.29² =
  19. 19.24² =
  20. 20.15² =
  21. 21.23² =
  22. 22.26² =
  23. 23.17² =
  24. 24.12² =
  25. 25.21² =
  26. 26.29² =
  27. 27.18² =
  28. 28.13² =
  29. 29.26² =
  30. 30.19² =
  31. 31.17² =
  32. 32.18² =
  33. 33.15² =
  34. 34.15² =
  35. 35.16² =
  36. 36.23² =
  37. 37.17² =
  38. 38.13² =
  39. 39.15² =
  40. 40.13² =

Answer key

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

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