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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 915 · 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. 2.17² =
  3. 3.23² =
  4. 4.21² =
  5. 5.12² =
  6. 6.15² =
  7. 7.25² =
  8. 8.11² =
  9. 9.24² =
  10. 10.13² =
  11. 11.29² =
  12. 12.14² =
  13. 13.28² =
  14. 14.26² =
  15. 15.16² =
  16. 16.22² =
  17. 17.23² =
  18. 18.12² =
  19. 19.15² =
  20. 20.27² =
  21. 21.21² =
  22. 22.18² =
  23. 23.21² =
  24. 24.16² =
  25. 25.25² =
  26. 26.13² =
  27. 27.29² =
  28. 28.17² =
  29. 29.21² =
  30. 30.12² =
  31. 31.29² =
  32. 32.12² =
  33. 33.14² =
  34. 34.18² =
  35. 35.15² =
  36. 36.17² =
  37. 37.17² =
  38. 38.21² =
  39. 39.15² =
  40. 40.21² =

Answer key

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

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