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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 684 · 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. 2.28² =
  3. 3.16² =
  4. 4.19² =
  5. 5.11² =
  6. 6.13² =
  7. 7.17² =
  8. 8.12² =
  9. 9.24² =
  10. 10.22² =
  11. 11.21² =
  12. 12.14² =
  13. 13.23² =
  14. 14.27² =
  15. 15.26² =
  16. 16.15² =
  17. 17.29² =
  18. 18.15² =
  19. 19.25² =
  20. 20.27² =
  21. 21.19² =
  22. 22.18² =
  23. 23.21² =
  24. 24.13² =
  25. 25.15² =
  26. 26.17² =
  27. 27.21² =
  28. 28.28² =
  29. 29.12² =
  30. 30.21² =
  31. 31.21² =
  32. 32.15² =
  33. 33.22² =
  34. 34.15² =
  35. 35.26² =
  36. 36.19² =
  37. 37.18² =
  38. 38.28² =
  39. 39.23² =
  40. 40.13² =

Answer key

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

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