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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 177 · 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. 2.14² =
  3. 3.15² =
  4. 4.22² =
  5. 5.19² =
  6. 6.12² =
  7. 7.26² =
  8. 8.24² =
  9. 9.29² =
  10. 10.21² =
  11. 11.16² =
  12. 12.28² =
  13. 13.13² =
  14. 14.11² =
  15. 15.25² =
  16. 16.18² =
  17. 17.17² =
  18. 18.21² =
  19. 19.23² =
  20. 20.12² =
  21. 21.28² =
  22. 22.23² =
  23. 23.17² =
  24. 24.21² =
  25. 25.21² =
  26. 26.27² =
  27. 27.28² =
  28. 28.21² =
  29. 29.18² =
  30. 30.15² =
  31. 31.21² =
  32. 32.28² =
  33. 33.12² =
  34. 34.16² =
  35. 35.23² =
  36. 36.27² =
  37. 37.29² =
  38. 38.23² =
  39. 39.24² =
  40. 40.17² =

Answer key

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

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