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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 981 · 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. 1.27² =
  2. 2.15² =
  3. 3.22² =
  4. 4.19² =
  5. 5.28² =
  6. 6.11² =
  7. 7.13² =
  8. 8.12² =
  9. 9.24² =
  10. 10.21² =
  11. 11.29² =
  12. 12.18² =
  13. 13.25² =
  14. 14.14² =
  15. 15.17² =
  16. 16.16² =
  17. 17.23² =
  18. 18.21² =
  19. 19.24² =
  20. 20.11² =
  21. 21.26² =
  22. 22.17² =
  23. 23.16² =
  24. 24.15² =
  25. 25.12² =
  26. 26.21² =
  27. 27.16² =
  28. 28.12² =
  29. 29.13² =
  30. 30.17² =
  31. 31.17² =
  32. 32.27² =
  33. 33.22² =
  34. 34.26² =
  35. 35.12² =
  36. 36.29² =
  37. 37.19² =
  38. 38.15² =
  39. 39.28² =
  40. 40.13² =

Answer key

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

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