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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 287 · 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. 2.12² =
  3. 3.25² =
  4. 4.26² =
  5. 5.13² =
  6. 6.28² =
  7. 7.19² =
  8. 8.18² =
  9. 9.24² =
  10. 10.23² =
  11. 11.17² =
  12. 12.11² =
  13. 13.16² =
  14. 14.29² =
  15. 15.22² =
  16. 16.15² =
  17. 17.23² =
  18. 18.26² =
  19. 19.14² =
  20. 20.27² =
  21. 21.26² =
  22. 22.23² =
  23. 23.28² =
  24. 24.21² =
  25. 25.17² =
  26. 26.24² =
  27. 27.28² =
  28. 28.28² =
  29. 29.18² =
  30. 30.14² =
  31. 31.18² =
  32. 32.12² =
  33. 33.18² =
  34. 34.17² =
  35. 35.29² =
  36. 36.25² =
  37. 37.27² =
  38. 38.15² =
  39. 39.29² =
  40. 40.19² =

Answer key

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

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