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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 984 · 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. 2.14² =
  3. 3.25² =
  4. 4.24² =
  5. 5.18² =
  6. 6.27² =
  7. 7.16² =
  8. 8.11² =
  9. 9.29² =
  10. 10.28² =
  11. 11.19² =
  12. 12.15² =
  13. 13.26² =
  14. 14.12² =
  15. 15.22² =
  16. 16.17² =
  17. 17.21² =
  18. 18.13² =
  19. 19.23² =
  20. 20.27² =
  21. 21.18² =
  22. 22.15² =
  23. 23.13² =
  24. 24.14² =
  25. 25.16² =
  26. 26.26² =
  27. 27.24² =
  28. 28.15² =
  29. 29.28² =
  30. 30.27² =
  31. 31.17² =
  32. 32.13² =
  33. 33.21² =
  34. 34.13² =
  35. 35.25² =
  36. 36.22² =
  37. 37.14² =
  38. 38.15² =
  39. 39.16² =
  40. 40.23² =

Answer key

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

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