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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 953 · 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. 2.21² =
  3. 3.19² =
  4. 4.13² =
  5. 5.24² =
  6. 6.11² =
  7. 7.15² =
  8. 8.29² =
  9. 9.12² =
  10. 10.27² =
  11. 11.23² =
  12. 12.14² =
  13. 13.22² =
  14. 14.26² =
  15. 15.25² =
  16. 16.16² =
  17. 17.18² =
  18. 18.15² =
  19. 19.15² =
  20. 20.28² =
  21. 21.12² =
  22. 22.23² =
  23. 23.17² =
  24. 24.24² =
  25. 25.17² =
  26. 26.21² =
  27. 27.25² =
  28. 28.24² =
  29. 29.11² =
  30. 30.12² =
  31. 31.14² =
  32. 32.11² =
  33. 33.15² =
  34. 34.19² =
  35. 35.14² =
  36. 36.12² =
  37. 37.17² =
  38. 38.11² =
  39. 39.26² =
  40. 40.13² =

Answer key

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

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