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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 905 · 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. 1.19² =
  2. 2.21² =
  3. 3.23² =
  4. 4.27² =
  5. 5.25² =
  6. 6.18² =
  7. 7.17² =
  8. 8.28² =
  9. 9.29² =
  10. 10.24² =
  11. 11.11² =
  12. 12.22² =
  13. 13.26² =
  14. 14.14² =
  15. 15.16² =
  16. 16.13² =
  17. 17.21² =
  18. 18.12² =
  19. 19.21² =
  20. 20.15² =
  21. 21.25² =
  22. 22.21² =
  23. 23.13² =
  24. 24.15² =
  25. 25.11² =
  26. 26.26² =
  27. 27.17² =
  28. 28.16² =
  29. 29.16² =
  30. 30.15² =
  31. 31.17² =
  32. 32.12² =
  33. 33.22² =
  34. 34.16² =
  35. 35.13² =
  36. 36.21² =
  37. 37.14² =
  38. 38.27² =
  39. 39.17² =
  40. 40.11² =

Answer key

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

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