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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 917 · 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. 1.19² =
  2. 2.14² =
  3. 3.18² =
  4. 4.24² =
  5. 5.15² =
  6. 6.28² =
  7. 7.12² =
  8. 8.21² =
  9. 9.13² =
  10. 10.17² =
  11. 11.25² =
  12. 12.11² =
  13. 13.29² =
  14. 14.16² =
  15. 15.23² =
  16. 16.29² =
  17. 17.22² =
  18. 18.26² =
  19. 19.27² =
  20. 20.27² =
  21. 21.16² =
  22. 22.16² =
  23. 23.17² =
  24. 24.15² =
  25. 25.24² =
  26. 26.25² =
  27. 27.26² =
  28. 28.11² =
  29. 29.16² =
  30. 30.19² =
  31. 31.21² =
  32. 32.17² =
  33. 33.24² =
  34. 34.21² =
  35. 35.14² =
  36. 36.21² =
  37. 37.22² =
  38. 38.16² =
  39. 39.19² =
  40. 40.17² =

Answer key

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

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