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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 349 · 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. 1.29² =
  2. 2.27² =
  3. 3.25² =
  4. 4.26² =
  5. 5.24² =
  6. 6.18² =
  7. 7.16² =
  8. 8.22² =
  9. 9.12² =
  10. 10.14² =
  11. 11.19² =
  12. 12.15² =
  13. 13.13² =
  14. 14.23² =
  15. 15.28² =
  16. 16.11² =
  17. 17.21² =
  18. 18.17² =
  19. 19.26² =
  20. 20.15² =
  21. 21.23² =
  22. 22.15² =
  23. 23.29² =
  24. 24.16² =
  25. 25.19² =
  26. 26.14² =
  27. 27.29² =
  28. 28.15² =
  29. 29.17² =
  30. 30.12² =
  31. 31.14² =
  32. 32.21² =
  33. 33.13² =
  34. 34.24² =
  35. 35.23² =
  36. 36.17² =
  37. 37.16² =
  38. 38.22² =
  39. 39.17² =
  40. 40.11² =

Answer key

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

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