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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 897 · 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. 1.21² =
  2. 2.29² =
  3. 3.16² =
  4. 4.19² =
  5. 5.15² =
  6. 6.23² =
  7. 7.28² =
  8. 8.12² =
  9. 9.11² =
  10. 10.18² =
  11. 11.17² =
  12. 12.22² =
  13. 13.13² =
  14. 14.14² =
  15. 15.24² =
  16. 16.21² =
  17. 17.26² =
  18. 18.24² =
  19. 19.25² =
  20. 20.27² =
  21. 21.27² =
  22. 22.21² =
  23. 23.16² =
  24. 24.29² =
  25. 25.18² =
  26. 26.29² =
  27. 27.21² =
  28. 28.16² =
  29. 29.18² =
  30. 30.26² =
  31. 31.25² =
  32. 32.23² =
  33. 33.28² =
  34. 34.13² =
  35. 35.27² =
  36. 36.16² =
  37. 37.15² =
  38. 38.19² =
  39. 39.22² =
  40. 40.18² =

Answer key

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

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