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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 996 · 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. 2.16² =
  3. 3.28² =
  4. 4.29² =
  5. 5.14² =
  6. 6.25² =
  7. 7.11² =
  8. 8.23² =
  9. 9.26² =
  10. 10.24² =
  11. 11.18² =
  12. 12.27² =
  13. 13.21² =
  14. 14.12² =
  15. 15.22² =
  16. 16.15² =
  17. 17.26² =
  18. 18.19² =
  19. 19.19² =
  20. 20.14² =
  21. 21.14² =
  22. 22.17² =
  23. 23.14² =
  24. 24.23² =
  25. 25.21² =
  26. 26.21² =
  27. 27.18² =
  28. 28.13² =
  29. 29.15² =
  30. 30.24² =
  31. 31.15² =
  32. 32.26² =
  33. 33.18² =
  34. 34.27² =
  35. 35.16² =
  36. 36.13² =
  37. 37.27² =
  38. 38.16² =
  39. 39.27² =
  40. 40.12² =

Answer key

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

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