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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 863 · 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. 2.24² =
  3. 3.29² =
  4. 4.13² =
  5. 5.15² =
  6. 6.16² =
  7. 7.11² =
  8. 8.23² =
  9. 9.19² =
  10. 10.14² =
  11. 11.21² =
  12. 12.17² =
  13. 13.12² =
  14. 14.18² =
  15. 15.25² =
  16. 16.22² =
  17. 17.15² =
  18. 18.26² =
  19. 19.12² =
  20. 20.28² =
  21. 21.29² =
  22. 22.11² =
  23. 23.26² =
  24. 24.24² =
  25. 25.17² =
  26. 26.27² =
  27. 27.22² =
  28. 28.24² =
  29. 29.24² =
  30. 30.16² =
  31. 31.15² =
  32. 32.21² =
  33. 33.21² =
  34. 34.14² =
  35. 35.25² =
  36. 36.23² =
  37. 37.15² =
  38. 38.29² =
  39. 39.11² =
  40. 40.11² =

Answer key

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

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