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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 902 · 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. 1.27² =
  2. 2.14² =
  3. 3.13² =
  4. 4.21² =
  5. 5.15² =
  6. 6.23² =
  7. 7.22² =
  8. 8.26² =
  9. 9.24² =
  10. 10.25² =
  11. 11.19² =
  12. 12.17² =
  13. 13.16² =
  14. 14.18² =
  15. 15.12² =
  16. 16.29² =
  17. 17.28² =
  18. 18.27² =
  19. 19.17² =
  20. 20.11² =
  21. 21.12² =
  22. 22.15² =
  23. 23.18² =
  24. 24.21² =
  25. 25.11² =
  26. 26.21² =
  27. 27.27² =
  28. 28.18² =
  29. 29.22² =
  30. 30.14² =
  31. 31.16² =
  32. 32.29² =
  33. 33.24² =
  34. 34.14² =
  35. 35.23² =
  36. 36.29² =
  37. 37.18² =
  38. 38.23² =
  39. 39.19² =
  40. 40.11² =

Answer key

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

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