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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 440 · 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. 1.23² =
  2. 2.29² =
  3. 3.18² =
  4. 4.27² =
  5. 5.22² =
  6. 6.14² =
  7. 7.21² =
  8. 8.12² =
  9. 9.26² =
  10. 10.13² =
  11. 11.19² =
  12. 12.11² =
  13. 13.15² =
  14. 14.16² =
  15. 15.25² =
  16. 16.24² =
  17. 17.28² =
  18. 18.17² =
  19. 19.21² =
  20. 20.13² =
  21. 21.26² =
  22. 22.11² =
  23. 23.24² =
  24. 24.15² =
  25. 25.15² =
  26. 26.21² =
  27. 27.21² =
  28. 28.18² =
  29. 29.11² =
  30. 30.29² =
  31. 31.16² =
  32. 32.26² =
  33. 33.21² =
  34. 34.21² =
  35. 35.12² =
  36. 36.18² =
  37. 37.25² =
  38. 38.23² =
  39. 39.26² =
  40. 40.26² =

Answer key

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

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