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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 911 · 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. 2.24² =
  3. 3.25² =
  4. 4.11² =
  5. 5.28² =
  6. 6.14² =
  7. 7.21² =
  8. 8.15² =
  9. 9.12² =
  10. 10.27² =
  11. 11.29² =
  12. 12.13² =
  13. 13.16² =
  14. 14.22² =
  15. 15.18² =
  16. 16.23² =
  17. 17.26² =
  18. 18.17² =
  19. 19.18² =
  20. 20.28² =
  21. 21.23² =
  22. 22.25² =
  23. 23.25² =
  24. 24.14² =
  25. 25.19² =
  26. 26.16² =
  27. 27.15² =
  28. 28.19² =
  29. 29.12² =
  30. 30.22² =
  31. 31.16² =
  32. 32.26² =
  33. 33.28² =
  34. 34.21² =
  35. 35.28² =
  36. 36.13² =
  37. 37.29² =
  38. 38.15² =
  39. 39.14² =
  40. 40.13² =

Answer key

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

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