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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 927 · 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. 1.21² =
  2. 2.22² =
  3. 3.27² =
  4. 4.28² =
  5. 5.23² =
  6. 6.16² =
  7. 7.12² =
  8. 8.18² =
  9. 9.29² =
  10. 10.11² =
  11. 11.24² =
  12. 12.15² =
  13. 13.14² =
  14. 14.17² =
  15. 15.13² =
  16. 16.26² =
  17. 17.19² =
  18. 18.28² =
  19. 19.24² =
  20. 20.19² =
  21. 21.25² =
  22. 22.27² =
  23. 23.19² =
  24. 24.26² =
  25. 25.26² =
  26. 26.15² =
  27. 27.24² =
  28. 28.13² =
  29. 29.17² =
  30. 30.15² =
  31. 31.14² =
  32. 32.25² =
  33. 33.23² =
  34. 34.29² =
  35. 35.14² =
  36. 36.16² =
  37. 37.24² =
  38. 38.19² =
  39. 39.16² =
  40. 40.17² =

Answer key

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

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