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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 418 · 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. 1.11² =
  2. 2.17² =
  3. 3.15² =
  4. 4.13² =
  5. 5.25² =
  6. 6.21² =
  7. 7.22² =
  8. 8.29² =
  9. 9.19² =
  10. 10.18² =
  11. 11.27² =
  12. 12.16² =
  13. 13.14² =
  14. 14.23² =
  15. 15.26² =
  16. 16.12² =
  17. 17.24² =
  18. 18.28² =
  19. 19.17² =
  20. 20.21² =
  21. 21.11² =
  22. 22.13² =
  23. 23.24² =
  24. 24.23² =
  25. 25.28² =
  26. 26.27² =
  27. 27.19² =
  28. 28.11² =
  29. 29.15² =
  30. 30.14² =
  31. 31.29² =
  32. 32.26² =
  33. 33.23² =
  34. 34.12² =
  35. 35.17² =
  36. 36.16² =
  37. 37.23² =
  38. 38.13² =
  39. 39.15² =
  40. 40.13² =

Answer key

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

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