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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 898 · 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. 1.17² =
  2. 2.27² =
  3. 3.16² =
  4. 4.21² =
  5. 5.29² =
  6. 6.28² =
  7. 7.12² =
  8. 8.25² =
  9. 9.13² =
  10. 10.26² =
  11. 11.22² =
  12. 12.23² =
  13. 13.14² =
  14. 14.15² =
  15. 15.19² =
  16. 16.18² =
  17. 17.18² =
  18. 18.11² =
  19. 19.21² =
  20. 20.24² =
  21. 21.17² =
  22. 22.21² =
  23. 23.13² =
  24. 24.15² =
  25. 25.13² =
  26. 26.16² =
  27. 27.26² =
  28. 28.24² =
  29. 29.19² =
  30. 30.16² =
  31. 31.13² =
  32. 32.24² =
  33. 33.14² =
  34. 34.18² =
  35. 35.11² =
  36. 36.27² =
  37. 37.18² =
  38. 38.19² =
  39. 39.27² =
  40. 40.16² =

Answer key

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

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