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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 914 · 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. 2.25² =
  3. 3.23² =
  4. 4.24² =
  5. 5.14² =
  6. 6.21² =
  7. 7.11² =
  8. 8.28² =
  9. 9.12² =
  10. 10.15² =
  11. 11.16² =
  12. 12.27² =
  13. 13.29² =
  14. 14.18² =
  15. 15.13² =
  16. 16.17² =
  17. 17.26² =
  18. 18.26² =
  19. 19.22² =
  20. 20.21² =
  21. 21.15² =
  22. 22.12² =
  23. 23.12² =
  24. 24.29² =
  25. 25.22² =
  26. 26.19² =
  27. 27.21² =
  28. 28.12² =
  29. 29.19² =
  30. 30.16² =
  31. 31.11² =
  32. 32.19² =
  33. 33.11² =
  34. 34.18² =
  35. 35.29² =
  36. 36.19² =
  37. 37.17² =
  38. 38.21² =
  39. 39.13² =
  40. 40.29² =

Answer key

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

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