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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 506 · 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. 1.11² =
  2. 2.13² =
  3. 3.26² =
  4. 4.29² =
  5. 5.27² =
  6. 6.14² =
  7. 7.16² =
  8. 8.17² =
  9. 9.22² =
  10. 10.24² =
  11. 11.12² =
  12. 12.28² =
  13. 13.19² =
  14. 14.25² =
  15. 15.21² =
  16. 16.18² =
  17. 17.26² =
  18. 18.15² =
  19. 19.29² =
  20. 20.24² =
  21. 21.14² =
  22. 22.16² =
  23. 23.18² =
  24. 24.23² =
  25. 25.18² =
  26. 26.11² =
  27. 27.29² =
  28. 28.18² =
  29. 29.12² =
  30. 30.14² =
  31. 31.11² =
  32. 32.28² =
  33. 33.19² =
  34. 34.15² =
  35. 35.25² =
  36. 36.17² =
  37. 37.19² =
  38. 38.19² =
  39. 39.17² =
  40. 40.27² =

Answer key

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

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