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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 304 · 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. 1.27² =
  2. 2.21² =
  3. 3.26² =
  4. 4.17² =
  5. 5.28² =
  6. 6.25² =
  7. 7.16² =
  8. 8.13² =
  9. 9.11² =
  10. 10.12² =
  11. 11.14² =
  12. 12.22² =
  13. 13.24² =
  14. 14.15² =
  15. 15.29² =
  16. 16.23² =
  17. 17.18² =
  18. 18.28² =
  19. 19.23² =
  20. 20.19² =
  21. 21.23² =
  22. 22.13² =
  23. 23.12² =
  24. 24.13² =
  25. 25.25² =
  26. 26.21² =
  27. 27.15² =
  28. 28.25² =
  29. 29.14² =
  30. 30.21² =
  31. 31.25² =
  32. 32.16² =
  33. 33.28² =
  34. 34.22² =
  35. 35.24² =
  36. 36.26² =
  37. 37.24² =
  38. 38.28² =
  39. 39.12² =
  40. 40.11² =

Answer key

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

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