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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 990 · 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. 2.19² =
  3. 3.29² =
  4. 4.22² =
  5. 5.11² =
  6. 6.14² =
  7. 7.21² =
  8. 8.15² =
  9. 9.23² =
  10. 10.25² =
  11. 11.18² =
  12. 12.12² =
  13. 13.16² =
  14. 14.17² =
  15. 15.27² =
  16. 16.24² =
  17. 17.21² =
  18. 18.28² =
  19. 19.21² =
  20. 20.26² =
  21. 21.23² =
  22. 22.27² =
  23. 23.17² =
  24. 24.21² =
  25. 25.25² =
  26. 26.15² =
  27. 27.25² =
  28. 28.27² =
  29. 29.23² =
  30. 30.17² =
  31. 31.12² =
  32. 32.26² =
  33. 33.14² =
  34. 34.17² =
  35. 35.23² =
  36. 36.27² =
  37. 37.28² =
  38. 38.18² =
  39. 39.21² =
  40. 40.11² =

Answer key

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

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