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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 869 · 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. 1.12² =
  2. 2.18² =
  3. 3.28² =
  4. 4.11² =
  5. 5.13² =
  6. 6.19² =
  7. 7.21² =
  8. 8.26² =
  9. 9.14² =
  10. 10.17² =
  11. 11.16² =
  12. 12.23² =
  13. 13.24² =
  14. 14.25² =
  15. 15.15² =
  16. 16.27² =
  17. 17.24² =
  18. 18.22² =
  19. 19.29² =
  20. 20.11² =
  21. 21.26² =
  22. 22.12² =
  23. 23.17² =
  24. 24.13² =
  25. 25.13² =
  26. 26.18² =
  27. 27.28² =
  28. 28.15² =
  29. 29.29² =
  30. 30.29² =
  31. 31.16² =
  32. 32.15² =
  33. 33.17² =
  34. 34.22² =
  35. 35.12² =
  36. 36.26² =
  37. 37.15² =
  38. 38.12² =
  39. 39.12² =
  40. 40.16² =

Answer key

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

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