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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 923 · 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. 1.19² =
  2. 2.15² =
  3. 3.12² =
  4. 4.11² =
  5. 5.17² =
  6. 6.21² =
  7. 7.16² =
  8. 8.27² =
  9. 9.24² =
  10. 10.14² =
  11. 11.13² =
  12. 12.23² =
  13. 13.29² =
  14. 14.22² =
  15. 15.28² =
  16. 16.26² =
  17. 17.25² =
  18. 18.26² =
  19. 19.18² =
  20. 20.23² =
  21. 21.24² =
  22. 22.29² =
  23. 23.28² =
  24. 24.26² =
  25. 25.24² =
  26. 26.26² =
  27. 27.21² =
  28. 28.14² =
  29. 29.27² =
  30. 30.17² =
  31. 31.28² =
  32. 32.17² =
  33. 33.24² =
  34. 34.11² =
  35. 35.26² =
  36. 36.18² =
  37. 37.11² =
  38. 38.12² =
  39. 39.26² =
  40. 40.24² =

Answer key

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

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