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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 989 · 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. 1.26² =
  2. 2.27² =
  3. 3.29² =
  4. 4.17² =
  5. 5.22² =
  6. 6.18² =
  7. 7.13² =
  8. 8.21² =
  9. 9.15² =
  10. 10.28² =
  11. 11.16² =
  12. 12.12² =
  13. 13.24² =
  14. 14.25² =
  15. 15.11² =
  16. 16.14² =
  17. 17.29² =
  18. 18.29² =
  19. 19.13² =
  20. 20.19² =
  21. 21.23² =
  22. 22.27² =
  23. 23.27² =
  24. 24.16² =
  25. 25.21² =
  26. 26.19² =
  27. 27.27² =
  28. 28.12² =
  29. 29.17² =
  30. 30.11² =
  31. 31.21² =
  32. 32.24² =
  33. 33.15² =
  34. 34.26² =
  35. 35.17² =
  36. 36.12² =
  37. 37.29² =
  38. 38.27² =
  39. 39.15² =
  40. 40.23² =

Answer key

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

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