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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 948 · 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. 3.27² =
  4. 4.18² =
  5. 5.17² =
  6. 6.11² =
  7. 7.13² =
  8. 8.28² =
  9. 9.16² =
  10. 10.23² =
  11. 11.21² =
  12. 12.19² =
  13. 13.14² =
  14. 14.12² =
  15. 15.25² =
  16. 16.22² =
  17. 17.16² =
  18. 18.21² =
  19. 19.19² =
  20. 20.29² =
  21. 21.23² =
  22. 22.26² =
  23. 23.25² =
  24. 24.21² =
  25. 25.17² =
  26. 26.27² =
  27. 27.18² =
  28. 28.12² =
  29. 29.25² =
  30. 30.15² =
  31. 31.15² =
  32. 32.23² =
  33. 33.16² =
  34. 34.23² =
  35. 35.15² =
  36. 36.11² =
  37. 37.23² =
  38. 38.19² =
  39. 39.14² =
  40. 40.21² =

Answer key

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

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