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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 977 · 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. 1.17² =
  2. 2.28² =
  3. 3.14² =
  4. 4.25² =
  5. 5.16² =
  6. 6.21² =
  7. 7.22² =
  8. 8.13² =
  9. 9.27² =
  10. 10.11² =
  11. 11.18² =
  12. 12.29² =
  13. 13.19² =
  14. 14.15² =
  15. 15.24² =
  16. 16.12² =
  17. 17.28² =
  18. 18.21² =
  19. 19.17² =
  20. 20.23² =
  21. 21.23² =
  22. 22.26² =
  23. 23.13² =
  24. 24.26² =
  25. 25.21² =
  26. 26.16² =
  27. 27.26² =
  28. 28.18² =
  29. 29.27² =
  30. 30.21² =
  31. 31.29² =
  32. 32.23² =
  33. 33.27² =
  34. 34.26² =
  35. 35.16² =
  36. 36.14² =
  37. 37.19² =
  38. 38.26² =
  39. 39.29² =
  40. 40.24² =

Answer key

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

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