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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 903 · 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. 1.24² =
  2. 2.15² =
  3. 3.21² =
  4. 4.13² =
  5. 5.28² =
  6. 6.22² =
  7. 7.11² =
  8. 8.16² =
  9. 9.25² =
  10. 10.17² =
  11. 11.18² =
  12. 12.26² =
  13. 13.12² =
  14. 14.19² =
  15. 15.27² =
  16. 16.14² =
  17. 17.13² =
  18. 18.16² =
  19. 19.23² =
  20. 20.19² =
  21. 21.16² =
  22. 22.12² =
  23. 23.29² =
  24. 24.19² =
  25. 25.15² =
  26. 26.14² =
  27. 27.15² =
  28. 28.23² =
  29. 29.21² =
  30. 30.23² =
  31. 31.22² =
  32. 32.21² =
  33. 33.13² =
  34. 34.15² =
  35. 35.26² =
  36. 36.19² =
  37. 37.15² =
  38. 38.13² =
  39. 39.21² =
  40. 40.16² =

Answer key

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

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