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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 972 · 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. 2.16² =
  3. 3.12² =
  4. 4.29² =
  5. 5.11² =
  6. 6.15² =
  7. 7.21² =
  8. 8.23² =
  9. 9.24² =
  10. 10.28² =
  11. 11.18² =
  12. 12.26² =
  13. 13.19² =
  14. 14.22² =
  15. 15.17² =
  16. 16.14² =
  17. 17.13² =
  18. 18.21² =
  19. 19.25² =
  20. 20.17² =
  21. 21.27² =
  22. 22.13² =
  23. 23.15² =
  24. 24.11² =
  25. 25.15² =
  26. 26.28² =
  27. 27.13² =
  28. 28.26² =
  29. 29.21² =
  30. 30.25² =
  31. 31.16² =
  32. 32.23² =
  33. 33.15² =
  34. 34.23² =
  35. 35.26² =
  36. 36.17² =
  37. 37.11² =
  38. 38.12² =
  39. 39.23² =
  40. 40.11² =

Answer key

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

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