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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 827 · 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. 1.16² =
  2. 2.19² =
  3. 3.23² =
  4. 4.24² =
  5. 5.26² =
  6. 6.22² =
  7. 7.25² =
  8. 8.18² =
  9. 9.21² =
  10. 10.28² =
  11. 11.14² =
  12. 12.13² =
  13. 13.12² =
  14. 14.15² =
  15. 15.29² =
  16. 16.17² =
  17. 17.27² =
  18. 18.11² =
  19. 19.23² =
  20. 20.11² =
  21. 21.16² =
  22. 22.23² =
  23. 23.13² =
  24. 24.15² =
  25. 25.12² =
  26. 26.13² =
  27. 27.29² =
  28. 28.12² =
  29. 29.24² =
  30. 30.28² =
  31. 31.11² =
  32. 32.11² =
  33. 33.15² =
  34. 34.28² =
  35. 35.27² =
  36. 36.21² =
  37. 37.29² =
  38. 38.28² =
  39. 39.23² =
  40. 40.13² =

Answer key

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

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