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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 933 · 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. 2.15² =
  3. 3.27² =
  4. 4.29² =
  5. 5.12² =
  6. 6.21² =
  7. 7.25² =
  8. 8.16² =
  9. 9.28² =
  10. 10.13² =
  11. 11.18² =
  12. 12.23² =
  13. 13.22² =
  14. 14.17² =
  15. 15.26² =
  16. 16.14² =
  17. 17.24² =
  18. 18.11² =
  19. 19.21² =
  20. 20.22² =
  21. 21.16² =
  22. 22.29² =
  23. 23.14² =
  24. 24.27² =
  25. 25.21² =
  26. 26.11² =
  27. 27.14² =
  28. 28.17² =
  29. 29.21² =
  30. 30.19² =
  31. 31.25² =
  32. 32.22² =
  33. 33.17² =
  34. 34.21² =
  35. 35.16² =
  36. 36.14² =
  37. 37.25² =
  38. 38.19² =
  39. 39.24² =
  40. 40.24² =

Answer key

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

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