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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 985 · 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. 1.16² =
  2. 2.11² =
  3. 3.15² =
  4. 4.22² =
  5. 5.25² =
  6. 6.23² =
  7. 7.14² =
  8. 8.28² =
  9. 9.13² =
  10. 10.21² =
  11. 11.27² =
  12. 12.17² =
  13. 13.23² =
  14. 14.18² =
  15. 15.19² =
  16. 16.26² =
  17. 17.12² =
  18. 18.15² =
  19. 19.24² =
  20. 20.21² =
  21. 21.16² =
  22. 22.29² =
  23. 23.15² =
  24. 24.29² =
  25. 25.16² =
  26. 26.25² =
  27. 27.17² =
  28. 28.29² =
  29. 29.13² =
  30. 30.11² =
  31. 31.27² =
  32. 32.24² =
  33. 33.11² =
  34. 34.28² =
  35. 35.16² =
  36. 36.27² =
  37. 37.21² =
  38. 38.21² =
  39. 39.18² =
  40. 40.21² =

Answer key

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

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