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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 931 · 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. 1.18² =
  2. 2.26² =
  3. 3.27² =
  4. 4.24² =
  5. 5.25² =
  6. 6.19² =
  7. 7.22² =
  8. 8.23² =
  9. 9.11² =
  10. 10.17² =
  11. 11.15² =
  12. 12.13² =
  13. 13.21² =
  14. 14.28² =
  15. 15.14² =
  16. 16.29² =
  17. 17.16² =
  18. 18.12² =
  19. 19.21² =
  20. 20.17² =
  21. 21.18² =
  22. 22.21² =
  23. 23.21² =
  24. 24.19² =
  25. 25.12² =
  26. 26.25² =
  27. 27.29² =
  28. 28.11² =
  29. 29.17² =
  30. 30.15² =
  31. 31.12² =
  32. 32.19² =
  33. 33.14² =
  34. 34.14² =
  35. 35.16² =
  36. 36.14² =
  37. 37.19² =
  38. 38.11² =
  39. 39.23² =
  40. 40.11² =

Answer key

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

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