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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 896 · 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. 1.23² =
  2. 2.13² =
  3. 3.15² =
  4. 4.21² =
  5. 5.12² =
  6. 6.19² =
  7. 7.27² =
  8. 8.11² =
  9. 9.14² =
  10. 10.16² =
  11. 11.29² =
  12. 12.24² =
  13. 13.18² =
  14. 14.25² =
  15. 15.26² =
  16. 16.22² =
  17. 17.17² =
  18. 18.21² =
  19. 19.25² =
  20. 20.28² =
  21. 21.19² =
  22. 22.15² =
  23. 23.15² =
  24. 24.12² =
  25. 25.16² =
  26. 26.21² =
  27. 27.21² =
  28. 28.23² =
  29. 29.16² =
  30. 30.21² =
  31. 31.16² =
  32. 32.17² =
  33. 33.21² =
  34. 34.11² =
  35. 35.11² =
  36. 36.28² =
  37. 37.25² =
  38. 38.26² =
  39. 39.18² =
  40. 40.11² =

Answer key

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

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