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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 282 · 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. 1.22² =
  2. 2.27² =
  3. 3.18² =
  4. 4.25² =
  5. 5.11² =
  6. 6.15² =
  7. 7.12² =
  8. 8.14² =
  9. 9.28² =
  10. 10.19² =
  11. 11.21² =
  12. 12.29² =
  13. 13.16² =
  14. 14.26² =
  15. 15.23² =
  16. 16.15² =
  17. 17.16² =
  18. 18.13² =
  19. 19.16² =
  20. 20.17² =
  21. 21.24² =
  22. 22.22² =
  23. 23.23² =
  24. 24.11² =
  25. 25.21² =
  26. 26.14² =
  27. 27.13² =
  28. 28.17² =
  29. 29.12² =
  30. 30.21² =
  31. 31.22² =
  32. 32.19² =
  33. 33.28² =
  34. 34.27² =
  35. 35.27² =
  36. 36.22² =
  37. 37.23² =
  38. 38.18² =
  39. 39.14² =
  40. 40.12² =

Answer key

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

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