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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 231 · 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. 1.29² =
  2. 2.15² =
  3. 3.11² =
  4. 4.27² =
  5. 5.12² =
  6. 6.24² =
  7. 7.23² =
  8. 8.16² =
  9. 9.14² =
  10. 10.18² =
  11. 11.19² =
  12. 12.26² =
  13. 13.25² =
  14. 14.21² =
  15. 15.28² =
  16. 16.23² =
  17. 17.22² =
  18. 18.12² =
  19. 19.11² =
  20. 20.11² =
  21. 21.17² =
  22. 22.24² =
  23. 23.23² =
  24. 24.25² =
  25. 25.26² =
  26. 26.13² =
  27. 27.21² =
  28. 28.12² =
  29. 29.22² =
  30. 30.15² =
  31. 31.15² =
  32. 32.13² =
  33. 33.24² =
  34. 34.23² =
  35. 35.15² =
  36. 36.24² =
  37. 37.26² =
  38. 38.17² =
  39. 39.26² =
  40. 40.26² =

Answer key

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

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