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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 975 · 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. 1.13² =
  2. 2.21² =
  3. 3.16² =
  4. 4.25² =
  5. 5.17² =
  6. 6.29² =
  7. 7.11² =
  8. 8.14² =
  9. 9.26² =
  10. 10.28² =
  11. 11.15² =
  12. 12.24² =
  13. 13.12² =
  14. 14.18² =
  15. 15.22² =
  16. 16.23² =
  17. 17.19² =
  18. 18.11² =
  19. 19.27² =
  20. 20.14² =
  21. 21.12² =
  22. 22.15² =
  23. 23.23² =
  24. 24.13² =
  25. 25.27² =
  26. 26.12² =
  27. 27.15² =
  28. 28.14² =
  29. 29.22² =
  30. 30.28² =
  31. 31.21² =
  32. 32.15² =
  33. 33.12² =
  34. 34.16² =
  35. 35.11² =
  36. 36.28² =
  37. 37.28² =
  38. 38.14² =
  39. 39.17² =
  40. 40.27² =

Answer key

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

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