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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 274 · 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. 1.21² =
  2. 2.22² =
  3. 3.19² =
  4. 4.18² =
  5. 5.12² =
  6. 6.26² =
  7. 7.27² =
  8. 8.25² =
  9. 9.28² =
  10. 10.14² =
  11. 11.23² =
  12. 12.15² =
  13. 13.17² =
  14. 14.13² =
  15. 15.11² =
  16. 16.24² =
  17. 17.11² =
  18. 18.13² =
  19. 19.29² =
  20. 20.16² =
  21. 21.14² =
  22. 22.28² =
  23. 23.14² =
  24. 24.22² =
  25. 25.19² =
  26. 26.29² =
  27. 27.17² =
  28. 28.29² =
  29. 29.28² =
  30. 30.22² =
  31. 31.13² =
  32. 32.11² =
  33. 33.14² =
  34. 34.19² =
  35. 35.28² =
  36. 36.17² =
  37. 37.26² =
  38. 38.28² =
  39. 39.16² =
  40. 40.13² =

Answer key

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

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