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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 731 · 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. 1.21² =
  2. 2.17² =
  3. 3.14² =
  4. 4.12² =
  5. 5.18² =
  6. 6.15² =
  7. 7.11² =
  8. 8.13² =
  9. 9.24² =
  10. 10.19² =
  11. 11.26² =
  12. 12.13² =
  13. 13.16² =
  14. 14.29² =
  15. 15.22² =
  16. 16.27² =
  17. 17.28² =
  18. 18.23² =
  19. 19.25² =
  20. 20.12² =
  21. 21.22² =
  22. 22.14² =
  23. 23.14² =
  24. 24.12² =
  25. 25.23² =
  26. 26.18² =
  27. 27.11² =
  28. 28.17² =
  29. 29.22² =
  30. 30.25² =
  31. 31.26² =
  32. 32.17² =
  33. 33.19² =
  34. 34.22² =
  35. 35.22² =
  36. 36.23² =
  37. 37.15² =
  38. 38.21² =
  39. 39.29² =
  40. 40.23² =

Answer key

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

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