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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 624 · 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. 1.23² =
  2. 2.18² =
  3. 3.29² =
  4. 4.21² =
  5. 5.14² =
  6. 6.19² =
  7. 7.12² =
  8. 8.17² =
  9. 9.11² =
  10. 10.27² =
  11. 11.15² =
  12. 12.16² =
  13. 13.13² =
  14. 14.26² =
  15. 15.25² =
  16. 16.22² =
  17. 17.21² =
  18. 18.15² =
  19. 19.11² =
  20. 20.13² =
  21. 21.24² =
  22. 22.28² =
  23. 23.15² =
  24. 24.14² =
  25. 25.19² =
  26. 26.12² =
  27. 27.12² =
  28. 28.14² =
  29. 29.28² =
  30. 30.14² =
  31. 31.15² =
  32. 32.24² =
  33. 33.24² =
  34. 34.27² =
  35. 35.18² =
  36. 36.28² =
  37. 37.15² =
  38. 38.17² =
  39. 39.11² =
  40. 40.16² =

Answer key

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

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