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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 991 · 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. 1.12² =
  2. 2.21² =
  3. 3.26² =
  4. 4.15² =
  5. 5.29² =
  6. 6.19² =
  7. 7.23² =
  8. 8.22² =
  9. 9.27² =
  10. 10.14² =
  11. 11.11² =
  12. 12.13² =
  13. 13.25² =
  14. 14.24² =
  15. 15.17² =
  16. 16.16² =
  17. 17.28² =
  18. 18.26² =
  19. 19.11² =
  20. 20.26² =
  21. 21.18² =
  22. 22.15² =
  23. 23.16² =
  24. 24.16² =
  25. 25.18² =
  26. 26.11² =
  27. 27.29² =
  28. 28.28² =
  29. 29.12² =
  30. 30.11² =
  31. 31.28² =
  32. 32.18² =
  33. 33.28² =
  34. 34.19² =
  35. 35.25² =
  36. 36.17² =
  37. 37.15² =
  38. 38.17² =
  39. 39.18² =
  40. 40.23² =

Answer key

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

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