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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 992 · 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. 1.13² =
  2. 2.19² =
  3. 3.27² =
  4. 4.24² =
  5. 5.12² =
  6. 6.21² =
  7. 7.16² =
  8. 8.11² =
  9. 9.25² =
  10. 10.14² =
  11. 11.15² =
  12. 12.26² =
  13. 13.29² =
  14. 14.18² =
  15. 15.17² =
  16. 16.22² =
  17. 17.23² =
  18. 18.18² =
  19. 19.27² =
  20. 20.21² =
  21. 21.19² =
  22. 22.28² =
  23. 23.19² =
  24. 24.18² =
  25. 25.21² =
  26. 26.13² =
  27. 27.15² =
  28. 28.29² =
  29. 29.19² =
  30. 30.23² =
  31. 31.18² =
  32. 32.19² =
  33. 33.12² =
  34. 34.16² =
  35. 35.23² =
  36. 36.14² =
  37. 37.23² =
  38. 38.28² =
  39. 39.16² =
  40. 40.19² =

Answer key

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

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