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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 936 · 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. 1.22² =
  2. 2.29² =
  3. 3.12² =
  4. 4.26² =
  5. 5.18² =
  6. 6.17² =
  7. 7.24² =
  8. 8.28² =
  9. 9.21² =
  10. 10.15² =
  11. 11.14² =
  12. 12.19² =
  13. 13.16² =
  14. 14.13² =
  15. 15.23² =
  16. 16.27² =
  17. 17.11² =
  18. 18.11² =
  19. 19.25² =
  20. 20.18² =
  21. 21.21² =
  22. 22.17² =
  23. 23.27² =
  24. 24.26² =
  25. 25.21² =
  26. 26.26² =
  27. 27.23² =
  28. 28.11² =
  29. 29.11² =
  30. 30.22² =
  31. 31.11² =
  32. 32.25² =
  33. 33.23² =
  34. 34.16² =
  35. 35.27² =
  36. 36.26² =
  37. 37.28² =
  38. 38.15² =
  39. 39.26² =
  40. 40.24² =

Answer key

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

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