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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 430 · 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. 2.22² =
  3. 3.12² =
  4. 4.18² =
  5. 5.24² =
  6. 6.13² =
  7. 7.11² =
  8. 8.23² =
  9. 9.28² =
  10. 10.15² =
  11. 11.25² =
  12. 12.16² =
  13. 13.21² =
  14. 14.26² =
  15. 15.14² =
  16. 16.29² =
  17. 17.27² =
  18. 18.19² =
  19. 19.27² =
  20. 20.24² =
  21. 21.17² =
  22. 22.13² =
  23. 23.18² =
  24. 24.12² =
  25. 25.16² =
  26. 26.26² =
  27. 27.17² =
  28. 28.18² =
  29. 29.24² =
  30. 30.28² =
  31. 31.12² =
  32. 32.21² =
  33. 33.27² =
  34. 34.18² =
  35. 35.17² =
  36. 36.25² =
  37. 37.22² =
  38. 38.15² =
  39. 39.11² =
  40. 40.27² =

Answer key

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

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