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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 878 · 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. 1.24² =
  2. 2.18² =
  3. 3.15² =
  4. 4.25² =
  5. 5.19² =
  6. 6.12² =
  7. 7.21² =
  8. 8.28² =
  9. 9.11² =
  10. 10.22² =
  11. 11.16² =
  12. 12.17² =
  13. 13.23² =
  14. 14.13² =
  15. 15.26² =
  16. 16.27² =
  17. 17.29² =
  18. 18.18² =
  19. 19.13² =
  20. 20.14² =
  21. 21.19² =
  22. 22.22² =
  23. 23.21² =
  24. 24.26² =
  25. 25.15² =
  26. 26.15² =
  27. 27.25² =
  28. 28.17² =
  29. 29.23² =
  30. 30.17² =
  31. 31.12² =
  32. 32.15² =
  33. 33.15² =
  34. 34.14² =
  35. 35.15² =
  36. 36.25² =
  37. 37.27² =
  38. 38.25² =
  39. 39.22² =
  40. 40.15² =

Answer key

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

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