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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 688 · 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. 1.11² =
  2. 2.16² =
  3. 3.17² =
  4. 4.25² =
  5. 5.23² =
  6. 6.24² =
  7. 7.26² =
  8. 8.21² =
  9. 9.14² =
  10. 10.28² =
  11. 11.13² =
  12. 12.12² =
  13. 13.18² =
  14. 14.19² =
  15. 15.27² =
  16. 16.15² =
  17. 17.22² =
  18. 18.29² =
  19. 19.26² =
  20. 20.27² =
  21. 21.27² =
  22. 22.12² =
  23. 23.14² =
  24. 24.14² =
  25. 25.28² =
  26. 26.16² =
  27. 27.12² =
  28. 28.22² =
  29. 29.27² =
  30. 30.11² =
  31. 31.28² =
  32. 32.11² =
  33. 33.15² =
  34. 34.17² =
  35. 35.13² =
  36. 36.28² =
  37. 37.11² =
  38. 38.12² =
  39. 39.19² =
  40. 40.27² =

Answer key

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

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