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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 976 · 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. 1.17² =
  2. 2.11² =
  3. 3.16² =
  4. 4.23² =
  5. 5.19² =
  6. 6.13² =
  7. 7.14² =
  8. 8.24² =
  9. 9.27² =
  10. 10.21² =
  11. 11.25² =
  12. 12.22² =
  13. 13.18² =
  14. 14.12² =
  15. 15.28² =
  16. 16.15² =
  17. 17.26² =
  18. 18.14² =
  19. 19.18² =
  20. 20.29² =
  21. 21.27² =
  22. 22.18² =
  23. 23.27² =
  24. 24.26² =
  25. 25.21² =
  26. 26.23² =
  27. 27.16² =
  28. 28.11² =
  29. 29.19² =
  30. 30.22² =
  31. 31.17² =
  32. 32.14² =
  33. 33.14² =
  34. 34.16² =
  35. 35.11² =
  36. 36.14² =
  37. 37.18² =
  38. 38.14² =
  39. 39.25² =
  40. 40.12² =

Answer key

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

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