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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 885 · 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. 1.24² =
  2. 2.23² =
  3. 3.17² =
  4. 4.28² =
  5. 5.13² =
  6. 6.16² =
  7. 7.29² =
  8. 8.18² =
  9. 9.25² =
  10. 10.27² =
  11. 11.26² =
  12. 12.11² =
  13. 13.19² =
  14. 14.14² =
  15. 15.21² =
  16. 16.22² =
  17. 17.15² =
  18. 18.17² =
  19. 19.28² =
  20. 20.14² =
  21. 21.13² =
  22. 22.12² =
  23. 23.25² =
  24. 24.16² =
  25. 25.28² =
  26. 26.26² =
  27. 27.13² =
  28. 28.29² =
  29. 29.25² =
  30. 30.13² =
  31. 31.28² =
  32. 32.15² =
  33. 33.27² =
  34. 34.24² =
  35. 35.12² =
  36. 36.15² =
  37. 37.25² =
  38. 38.22² =
  39. 39.28² =
  40. 40.27² =

Answer key

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

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