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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 409 · 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. 1.15² =
  2. 2.12² =
  3. 3.26² =
  4. 4.11² =
  5. 5.29² =
  6. 6.13² =
  7. 7.17² =
  8. 8.23² =
  9. 9.27² =
  10. 10.14² =
  11. 11.16² =
  12. 12.19² =
  13. 13.21² =
  14. 14.22² =
  15. 15.18² =
  16. 16.24² =
  17. 17.25² =
  18. 18.25² =
  19. 19.28² =
  20. 20.18² =
  21. 21.26² =
  22. 22.29² =
  23. 23.19² =
  24. 24.18² =
  25. 25.22² =
  26. 26.28² =
  27. 27.17² =
  28. 28.21² =
  29. 29.16² =
  30. 30.26² =
  31. 31.18² =
  32. 32.15² =
  33. 33.19² =
  34. 34.13² =
  35. 35.12² =
  36. 36.12² =
  37. 37.23² =
  38. 38.14² =
  39. 39.21² =
  40. 40.15² =

Answer key

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

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