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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 949 · 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. 1.25² =
  2. 2.29² =
  3. 3.11² =
  4. 4.19² =
  5. 5.28² =
  6. 6.12² =
  7. 7.13² =
  8. 8.26² =
  9. 9.18² =
  10. 10.24² =
  11. 11.14² =
  12. 12.17² =
  13. 13.22² =
  14. 14.21² =
  15. 15.15² =
  16. 16.16² =
  17. 17.23² =
  18. 18.27² =
  19. 19.11² =
  20. 20.23² =
  21. 21.19² =
  22. 22.21² =
  23. 23.28² =
  24. 24.13² =
  25. 25.17² =
  26. 26.17² =
  27. 27.16² =
  28. 28.28² =
  29. 29.17² =
  30. 30.15² =
  31. 31.25² =
  32. 32.29² =
  33. 33.13² =
  34. 34.29² =
  35. 35.12² =
  36. 36.17² =
  37. 37.17² =
  38. 38.14² =
  39. 39.24² =
  40. 40.24² =

Answer key

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

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