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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 937 · 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. 1.14² =
  2. 2.15² =
  3. 3.19² =
  4. 4.25² =
  5. 5.16² =
  6. 6.22² =
  7. 7.11² =
  8. 8.29² =
  9. 9.21² =
  10. 10.17² =
  11. 11.13² =
  12. 12.26² =
  13. 13.24² =
  14. 14.12² =
  15. 15.23² =
  16. 16.28² =
  17. 17.18² =
  18. 18.21² =
  19. 19.17² =
  20. 20.27² =
  21. 21.15² =
  22. 22.27² =
  23. 23.13² =
  24. 24.16² =
  25. 25.11² =
  26. 26.23² =
  27. 27.26² =
  28. 28.14² =
  29. 29.14² =
  30. 30.18² =
  31. 31.12² =
  32. 32.25² =
  33. 33.21² =
  34. 34.18² =
  35. 35.28² =
  36. 36.21² =
  37. 37.15² =
  38. 38.22² =
  39. 39.13² =
  40. 40.26² =

Answer key

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

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