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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 825 · 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. 1.12² =
  2. 2.18² =
  3. 3.24² =
  4. 4.25² =
  5. 5.21² =
  6. 6.15² =
  7. 7.28² =
  8. 8.27² =
  9. 9.17² =
  10. 10.14² =
  11. 11.26² =
  12. 12.11² =
  13. 13.13² =
  14. 14.19² =
  15. 15.16² =
  16. 16.22² =
  17. 17.14² =
  18. 18.27² =
  19. 19.29² =
  20. 20.23² =
  21. 21.13² =
  22. 22.22² =
  23. 23.18² =
  24. 24.17² =
  25. 25.24² =
  26. 26.28² =
  27. 27.17² =
  28. 28.22² =
  29. 29.17² =
  30. 30.21² =
  31. 31.19² =
  32. 32.25² =
  33. 33.24² =
  34. 34.28² =
  35. 35.24² =
  36. 36.15² =
  37. 37.18² =
  38. 38.19² =
  39. 39.18² =
  40. 40.19² =

Answer key

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

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