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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 99 · 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. 3.18² =
  4. 4.23² =
  5. 5.28² =
  6. 6.22² =
  7. 7.13² =
  8. 8.19² =
  9. 9.16² =
  10. 10.11² =
  11. 11.15² =
  12. 12.17² =
  13. 13.14² =
  14. 14.12² =
  15. 15.24² =
  16. 16.25² =
  17. 17.26² =
  18. 18.29² =
  19. 19.14² =
  20. 20.25² =
  21. 21.22² =
  22. 22.25² =
  23. 23.29² =
  24. 24.14² =
  25. 25.11² =
  26. 26.23² =
  27. 27.26² =
  28. 28.21² =
  29. 29.19² =
  30. 30.29² =
  31. 31.12² =
  32. 32.23² =
  33. 33.13² =
  34. 34.14² =
  35. 35.15² =
  36. 36.11² =
  37. 37.11² =
  38. 38.19² =
  39. 39.28² =
  40. 40.26² =

Answer key

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

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