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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 111 · 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. 1.15² =
  2. 2.22² =
  3. 3.27² =
  4. 4.29² =
  5. 5.21² =
  6. 6.13² =
  7. 7.23² =
  8. 8.28² =
  9. 9.17² =
  10. 10.24² =
  11. 11.19² =
  12. 12.14² =
  13. 13.16² =
  14. 14.25² =
  15. 15.26² =
  16. 16.12² =
  17. 17.11² =
  18. 18.18² =
  19. 19.18² =
  20. 20.12² =
  21. 21.15² =
  22. 22.27² =
  23. 23.27² =
  24. 24.11² =
  25. 25.27² =
  26. 26.11² =
  27. 27.13² =
  28. 28.17² =
  29. 29.14² =
  30. 30.14² =
  31. 31.25² =
  32. 32.14² =
  33. 33.14² =
  34. 34.18² =
  35. 35.15² =
  36. 36.11² =
  37. 37.28² =
  38. 38.22² =
  39. 39.21² =
  40. 40.27² =

Answer key

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

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