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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 957 · 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. 2.16² =
  3. 3.26² =
  4. 4.14² =
  5. 5.19² =
  6. 6.28² =
  7. 7.25² =
  8. 8.21² =
  9. 9.15² =
  10. 10.13² =
  11. 11.11² =
  12. 12.22² =
  13. 13.29² =
  14. 14.18² =
  15. 15.26² =
  16. 16.17² =
  17. 17.13² =
  18. 18.27² =
  19. 19.11² =
  20. 20.24² =
  21. 21.12² =
  22. 22.16² =
  23. 23.23² =
  24. 24.16² =
  25. 25.21² =
  26. 26.17² =
  27. 27.15² =
  28. 28.13² =
  29. 29.16² =
  30. 30.18² =
  31. 31.21² =
  32. 32.12² =
  33. 33.28² =
  34. 34.11² =
  35. 35.25² =
  36. 36.29² =
  37. 37.19² =
  38. 38.21² =
  39. 39.27² =
  40. 40.18² =

Answer key

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

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