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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 986 · 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. 2.17² =
  3. 3.19² =
  4. 4.22² =
  5. 5.18² =
  6. 6.26² =
  7. 7.15² =
  8. 8.29² =
  9. 9.12² =
  10. 10.24² =
  11. 11.27² =
  12. 12.23² =
  13. 13.25² =
  14. 14.14² =
  15. 15.28² =
  16. 16.21² =
  17. 17.11² =
  18. 18.16² =
  19. 19.12² =
  20. 20.22² =
  21. 21.21² =
  22. 22.25² =
  23. 23.13² =
  24. 24.22² =
  25. 25.29² =
  26. 26.14² =
  27. 27.14² =
  28. 28.24² =
  29. 29.24² =
  30. 30.17² =
  31. 31.24² =
  32. 32.17² =
  33. 33.15² =
  34. 34.11² =
  35. 35.15² =
  36. 36.25² =
  37. 37.14² =
  38. 38.15² =
  39. 39.19² =
  40. 40.29² =

Answer key

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

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