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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 974 · 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. 2.21² =
  3. 3.28² =
  4. 4.22² =
  5. 5.12² =
  6. 6.25² =
  7. 7.14² =
  8. 8.24² =
  9. 9.16² =
  10. 10.19² =
  11. 11.26² =
  12. 12.11² =
  13. 13.13² =
  14. 14.15² =
  15. 15.23² =
  16. 16.18² =
  17. 17.29² =
  18. 18.17² =
  19. 19.21² =
  20. 20.26² =
  21. 21.16² =
  22. 22.15² =
  23. 23.18² =
  24. 24.17² =
  25. 25.25² =
  26. 26.13² =
  27. 27.15² =
  28. 28.15² =
  29. 29.11² =
  30. 30.22² =
  31. 31.24² =
  32. 32.16² =
  33. 33.13² =
  34. 34.15² =
  35. 35.23² =
  36. 36.15² =
  37. 37.11² =
  38. 38.12² =
  39. 39.24² =
  40. 40.29² =

Answer key

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

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