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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 960 · 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. 1.15² =
  2. 2.11² =
  3. 3.18² =
  4. 4.12² =
  5. 5.13² =
  6. 6.14² =
  7. 7.27² =
  8. 8.21² =
  9. 9.26² =
  10. 10.16² =
  11. 11.23² =
  12. 12.19² =
  13. 13.22² =
  14. 14.29² =
  15. 15.25² =
  16. 16.17² =
  17. 17.28² =
  18. 18.24² =
  19. 19.11² =
  20. 20.21² =
  21. 21.17² =
  22. 22.14² =
  23. 23.24² =
  24. 24.24² =
  25. 25.26² =
  26. 26.18² =
  27. 27.13² =
  28. 28.18² =
  29. 29.29² =
  30. 30.28² =
  31. 31.12² =
  32. 32.29² =
  33. 33.13² =
  34. 34.13² =
  35. 35.29² =
  36. 36.19² =
  37. 37.29² =
  38. 38.21² =
  39. 39.26² =
  40. 40.16² =

Answer key

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

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