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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 877 · 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. 1.21² =
  2. 2.23² =
  3. 3.24² =
  4. 4.14² =
  5. 5.25² =
  6. 6.29² =
  7. 7.22² =
  8. 8.28² =
  9. 9.11² =
  10. 10.16² =
  11. 11.17² =
  12. 12.18² =
  13. 13.15² =
  14. 14.13² =
  15. 15.12² =
  16. 16.19² =
  17. 17.26² =
  18. 18.27² =
  19. 19.15² =
  20. 20.28² =
  21. 21.18² =
  22. 22.27² =
  23. 23.14² =
  24. 24.13² =
  25. 25.12² =
  26. 26.28² =
  27. 27.26² =
  28. 28.12² =
  29. 29.19² =
  30. 30.15² =
  31. 31.11² =
  32. 32.17² =
  33. 33.29² =
  34. 34.23² =
  35. 35.11² =
  36. 36.14² =
  37. 37.15² =
  38. 38.11² =
  39. 39.27² =
  40. 40.11² =

Answer key

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

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