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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 889 · 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. 1.14² =
  2. 2.16² =
  3. 3.15² =
  4. 4.12² =
  5. 5.24² =
  6. 6.11² =
  7. 7.21² =
  8. 8.25² =
  9. 9.23² =
  10. 10.18² =
  11. 11.28² =
  12. 12.27² =
  13. 13.26² =
  14. 14.17² =
  15. 15.29² =
  16. 16.23² =
  17. 17.22² =
  18. 18.13² =
  19. 19.19² =
  20. 20.27² =
  21. 21.15² =
  22. 22.25² =
  23. 23.29² =
  24. 24.17² =
  25. 25.14² =
  26. 26.11² =
  27. 27.17² =
  28. 28.25² =
  29. 29.12² =
  30. 30.12² =
  31. 31.18² =
  32. 32.21² =
  33. 33.18² =
  34. 34.25² =
  35. 35.16² =
  36. 36.27² =
  37. 37.15² =
  38. 38.17² =
  39. 39.24² =
  40. 40.13² =

Answer key

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

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