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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 959 · 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. 1.22² =
  2. 2.26² =
  3. 3.29² =
  4. 4.21² =
  5. 5.13² =
  6. 6.15² =
  7. 7.12² =
  8. 8.18² =
  9. 9.16² =
  10. 10.11² =
  11. 11.19² =
  12. 12.17² =
  13. 13.14² =
  14. 14.28² =
  15. 15.27² =
  16. 16.28² =
  17. 17.23² =
  18. 18.11² =
  19. 19.21² =
  20. 20.24² =
  21. 21.25² =
  22. 22.18² =
  23. 23.27² =
  24. 24.21² =
  25. 25.15² =
  26. 26.12² =
  27. 27.26² =
  28. 28.21² =
  29. 29.26² =
  30. 30.12² =
  31. 31.28² =
  32. 32.26² =
  33. 33.21² =
  34. 34.21² =
  35. 35.12² =
  36. 36.29² =
  37. 37.26² =
  38. 38.29² =
  39. 39.16² =
  40. 40.13² =

Answer key

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

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