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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 655 · 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. 2.25² =
  3. 3.18² =
  4. 4.16² =
  5. 5.14² =
  6. 6.17² =
  7. 7.22² =
  8. 8.29² =
  9. 9.28² =
  10. 10.19² =
  11. 11.23² =
  12. 12.26² =
  13. 13.21² =
  14. 14.12² =
  15. 15.17² =
  16. 16.15² =
  17. 17.19² =
  18. 18.13² =
  19. 19.24² =
  20. 20.16² =
  21. 21.16² =
  22. 22.12² =
  23. 23.22² =
  24. 24.28² =
  25. 25.27² =
  26. 26.15² =
  27. 27.13² =
  28. 28.15² =
  29. 29.12² =
  30. 30.11² =
  31. 31.15² =
  32. 32.15² =
  33. 33.23² =
  34. 34.28² =
  35. 35.12² =
  36. 36.24² =
  37. 37.14² =
  38. 38.23² =
  39. 39.19² =
  40. 40.11² =

Answer key

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

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