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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 242 · 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. 1.28² =
  2. 2.25² =
  3. 3.13² =
  4. 4.24² =
  5. 5.29² =
  6. 6.26² =
  7. 7.21² =
  8. 8.18² =
  9. 9.16² =
  10. 10.19² =
  11. 11.17² =
  12. 12.11² =
  13. 13.15² =
  14. 14.27² =
  15. 15.22² =
  16. 16.12² =
  17. 17.14² =
  18. 18.23² =
  19. 19.13² =
  20. 20.17² =
  21. 21.17² =
  22. 22.12² =
  23. 23.18² =
  24. 24.24² =
  25. 25.11² =
  26. 26.15² =
  27. 27.24² =
  28. 28.14² =
  29. 29.19² =
  30. 30.16² =
  31. 31.28² =
  32. 32.26² =
  33. 33.26² =
  34. 34.16² =
  35. 35.26² =
  36. 36.16² =
  37. 37.16² =
  38. 38.26² =
  39. 39.14² =
  40. 40.11² =

Answer key

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

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