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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 892 · 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. 2.11² =
  3. 3.27² =
  4. 4.15² =
  5. 5.13² =
  6. 6.18² =
  7. 7.16² =
  8. 8.26² =
  9. 9.25² =
  10. 10.19² =
  11. 11.14² =
  12. 12.28² =
  13. 13.17² =
  14. 14.29² =
  15. 15.12² =
  16. 16.22² =
  17. 17.24² =
  18. 18.15² =
  19. 19.26² =
  20. 20.28² =
  21. 21.23² =
  22. 22.27² =
  23. 23.27² =
  24. 24.14² =
  25. 25.12² =
  26. 26.25² =
  27. 27.15² =
  28. 28.16² =
  29. 29.14² =
  30. 30.19² =
  31. 31.16² =
  32. 32.25² =
  33. 33.17² =
  34. 34.21² =
  35. 35.14² =
  36. 36.25² =
  37. 37.26² =
  38. 38.26² =
  39. 39.15² =
  40. 40.12² =

Answer key

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

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