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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 833 · 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. 1.15² =
  2. 2.14² =
  3. 3.29² =
  4. 4.12² =
  5. 5.23² =
  6. 6.19² =
  7. 7.24² =
  8. 8.21² =
  9. 9.22² =
  10. 10.11² =
  11. 11.28² =
  12. 12.18² =
  13. 13.25² =
  14. 14.16² =
  15. 15.27² =
  16. 16.13² =
  17. 17.21² =
  18. 18.26² =
  19. 19.17² =
  20. 20.16² =
  21. 21.12² =
  22. 22.18² =
  23. 23.27² =
  24. 24.17² =
  25. 25.21² =
  26. 26.24² =
  27. 27.28² =
  28. 28.19² =
  29. 29.12² =
  30. 30.24² =
  31. 31.14² =
  32. 32.12² =
  33. 33.15² =
  34. 34.16² =
  35. 35.26² =
  36. 36.26² =
  37. 37.13² =
  38. 38.11² =
  39. 39.26² =
  40. 40.15² =

Answer key

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

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