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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 311 · 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. 2.12² =
  3. 3.24² =
  4. 4.14² =
  5. 5.17² =
  6. 6.21² =
  7. 7.29² =
  8. 8.23² =
  9. 9.11² =
  10. 10.15² =
  11. 11.19² =
  12. 12.16² =
  13. 13.26² =
  14. 14.18² =
  15. 15.28² =
  16. 16.25² =
  17. 17.13² =
  18. 18.22² =
  19. 19.28² =
  20. 20.18² =
  21. 21.25² =
  22. 22.21² =
  23. 23.11² =
  24. 24.11² =
  25. 25.15² =
  26. 26.23² =
  27. 27.26² =
  28. 28.16² =
  29. 29.19² =
  30. 30.14² =
  31. 31.14² =
  32. 32.21² =
  33. 33.29² =
  34. 34.17² =
  35. 35.18² =
  36. 36.24² =
  37. 37.14² =
  38. 38.29² =
  39. 39.12² =
  40. 40.28² =

Answer key

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

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