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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 910 · 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. 1.28² =
  2. 2.23² =
  3. 3.29² =
  4. 4.22² =
  5. 5.19² =
  6. 6.16² =
  7. 7.11² =
  8. 8.27² =
  9. 9.18² =
  10. 10.24² =
  11. 11.13² =
  12. 12.17² =
  13. 13.14² =
  14. 14.26² =
  15. 15.21² =
  16. 16.12² =
  17. 17.15² =
  18. 18.21² =
  19. 19.25² =
  20. 20.15² =
  21. 21.24² =
  22. 22.27² =
  23. 23.26² =
  24. 24.22² =
  25. 25.21² =
  26. 26.28² =
  27. 27.24² =
  28. 28.14² =
  29. 29.15² =
  30. 30.18² =
  31. 31.17² =
  32. 32.14² =
  33. 33.12² =
  34. 34.17² =
  35. 35.21² =
  36. 36.24² =
  37. 37.27² =
  38. 38.19² =
  39. 39.12² =
  40. 40.27² =

Answer key

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

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