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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 950 · 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. 1.28² =
  2. 2.29² =
  3. 3.15² =
  4. 4.11² =
  5. 5.19² =
  6. 6.17² =
  7. 7.14² =
  8. 8.18² =
  9. 9.23² =
  10. 10.21² =
  11. 11.16² =
  12. 12.22² =
  13. 13.13² =
  14. 14.24² =
  15. 15.25² =
  16. 16.12² =
  17. 17.27² =
  18. 18.26² =
  19. 19.14² =
  20. 20.15² =
  21. 21.19² =
  22. 22.19² =
  23. 23.28² =
  24. 24.15² =
  25. 25.14² =
  26. 26.16² =
  27. 27.16² =
  28. 28.29² =
  29. 29.24² =
  30. 30.11² =
  31. 31.24² =
  32. 32.23² =
  33. 33.11² =
  34. 34.21² =
  35. 35.16² =
  36. 36.13² =
  37. 37.11² =
  38. 38.26² =
  39. 39.12² =
  40. 40.11² =

Answer key

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

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