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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 450 · 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. 2.21² =
  3. 3.18² =
  4. 4.27² =
  5. 5.16² =
  6. 6.11² =
  7. 7.14² =
  8. 8.26² =
  9. 9.29² =
  10. 10.15² =
  11. 11.24² =
  12. 12.13² =
  13. 13.25² =
  14. 14.22² =
  15. 15.28² =
  16. 16.14² =
  17. 17.17² =
  18. 18.19² =
  19. 19.29² =
  20. 20.23² =
  21. 21.17² =
  22. 22.24² =
  23. 23.25² =
  24. 24.16² =
  25. 25.14² =
  26. 26.26² =
  27. 27.29² =
  28. 28.15² =
  29. 29.19² =
  30. 30.14² =
  31. 31.23² =
  32. 32.12² =
  33. 33.26² =
  34. 34.19² =
  35. 35.16² =
  36. 36.28² =
  37. 37.15² =
  38. 38.18² =
  39. 39.17² =
  40. 40.13² =

Answer key

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

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