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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 967 · 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. 2.18² =
  3. 3.17² =
  4. 4.11² =
  5. 5.12² =
  6. 6.22² =
  7. 7.21² =
  8. 8.27² =
  9. 9.16² =
  10. 10.14² =
  11. 11.28² =
  12. 12.26² =
  13. 13.29² =
  14. 14.23² =
  15. 15.15² =
  16. 16.19² =
  17. 17.25² =
  18. 18.19² =
  19. 19.14² =
  20. 20.24² =
  21. 21.21² =
  22. 22.21² =
  23. 23.15² =
  24. 24.21² =
  25. 25.18² =
  26. 26.11² =
  27. 27.11² =
  28. 28.11² =
  29. 29.12² =
  30. 30.28² =
  31. 31.16² =
  32. 32.19² =
  33. 33.16² =
  34. 34.21² =
  35. 35.15² =
  36. 36.21² =
  37. 37.21² =
  38. 38.22² =
  39. 39.13² =
  40. 40.28² =

Answer key

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

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