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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 956 · 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. 2.15² =
  3. 3.29² =
  4. 4.17² =
  5. 5.22² =
  6. 6.21² =
  7. 7.28² =
  8. 8.14² =
  9. 9.16² =
  10. 10.13² =
  11. 11.24² =
  12. 12.27² =
  13. 13.23² =
  14. 14.11² =
  15. 15.18² =
  16. 16.19² =
  17. 17.21² =
  18. 18.25² =
  19. 19.12² =
  20. 20.29² =
  21. 21.24² =
  22. 22.12² =
  23. 23.23² =
  24. 24.17² =
  25. 25.23² =
  26. 26.21² =
  27. 27.29² =
  28. 28.16² =
  29. 29.26² =
  30. 30.11² =
  31. 31.11² =
  32. 32.17² =
  33. 33.15² =
  34. 34.11² =
  35. 35.16² =
  36. 36.18² =
  37. 37.17² =
  38. 38.11² =
  39. 39.25² =
  40. 40.16² =

Answer key

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

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