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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 924 · 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. 2.29² =
  3. 3.21² =
  4. 4.25² =
  5. 5.17² =
  6. 6.12² =
  7. 7.15² =
  8. 8.22² =
  9. 9.19² =
  10. 10.26² =
  11. 11.28² =
  12. 12.14² =
  13. 13.24² =
  14. 14.18² =
  15. 15.27² =
  16. 16.23² =
  17. 17.13² =
  18. 18.11² =
  19. 19.27² =
  20. 20.23² =
  21. 21.11² =
  22. 22.29² =
  23. 23.26² =
  24. 24.29² =
  25. 25.24² =
  26. 26.23² =
  27. 27.25² =
  28. 28.28² =
  29. 29.28² =
  30. 30.26² =
  31. 31.12² =
  32. 32.11² =
  33. 33.26² =
  34. 34.24² =
  35. 35.21² =
  36. 36.13² =
  37. 37.14² =
  38. 38.11² =
  39. 39.19² =
  40. 40.28² =

Answer key

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

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