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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 841 · 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. 1.27² =
  2. 2.17² =
  3. 3.26² =
  4. 4.23² =
  5. 5.18² =
  6. 6.25² =
  7. 7.16² =
  8. 8.22² =
  9. 9.12² =
  10. 10.21² =
  11. 11.11² =
  12. 12.14² =
  13. 13.24² =
  14. 14.13² =
  15. 15.19² =
  16. 16.15² =
  17. 17.15² =
  18. 18.28² =
  19. 19.29² =
  20. 20.12² =
  21. 21.21² =
  22. 22.16² =
  23. 23.19² =
  24. 24.21² =
  25. 25.21² =
  26. 26.28² =
  27. 27.28² =
  28. 28.11² =
  29. 29.21² =
  30. 30.17² =
  31. 31.26² =
  32. 32.29² =
  33. 33.19² =
  34. 34.22² =
  35. 35.23² =
  36. 36.11² =
  37. 37.19² =
  38. 38.29² =
  39. 39.16² =
  40. 40.16² =

Answer key

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

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