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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 895 · 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. 1.26² =
  2. 2.17² =
  3. 3.24² =
  4. 4.25² =
  5. 5.29² =
  6. 6.14² =
  7. 7.21² =
  8. 8.28² =
  9. 9.19² =
  10. 10.27² =
  11. 11.12² =
  12. 12.15² =
  13. 13.23² =
  14. 14.11² =
  15. 15.13² =
  16. 16.22² =
  17. 17.13² =
  18. 18.28² =
  19. 19.15² =
  20. 20.23² =
  21. 21.18² =
  22. 22.12² =
  23. 23.14² =
  24. 24.16² =
  25. 25.12² =
  26. 26.13² =
  27. 27.13² =
  28. 28.27² =
  29. 29.19² =
  30. 30.13² =
  31. 31.27² =
  32. 32.23² =
  33. 33.22² =
  34. 34.26² =
  35. 35.15² =
  36. 36.27² =
  37. 37.29² =
  38. 38.21² =
  39. 39.26² =
  40. 40.16² =

Answer key

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

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