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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 816 · 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. 1.26² =
  2. 2.23² =
  3. 3.16² =
  4. 4.21² =
  5. 5.24² =
  6. 6.17² =
  7. 7.12² =
  8. 8.19² =
  9. 9.15² =
  10. 10.13² =
  11. 11.28² =
  12. 12.14² =
  13. 13.25² =
  14. 14.27² =
  15. 15.11² =
  16. 16.22² =
  17. 17.18² =
  18. 18.17² =
  19. 19.23² =
  20. 20.23² =
  21. 21.28² =
  22. 22.29² =
  23. 23.27² =
  24. 24.19² =
  25. 25.18² =
  26. 26.29² =
  27. 27.28² =
  28. 28.12² =
  29. 29.21² =
  30. 30.12² =
  31. 31.11² =
  32. 32.17² =
  33. 33.28² =
  34. 34.28² =
  35. 35.18² =
  36. 36.23² =
  37. 37.16² =
  38. 38.13² =
  39. 39.27² =
  40. 40.15² =

Answer key

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

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