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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 893 · 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. 1.26² =
  2. 2.18² =
  3. 3.15² =
  4. 4.24² =
  5. 5.13² =
  6. 6.11² =
  7. 7.14² =
  8. 8.23² =
  9. 9.19² =
  10. 10.29² =
  11. 11.16² =
  12. 12.12² =
  13. 13.27² =
  14. 14.28² =
  15. 15.22² =
  16. 16.17² =
  17. 17.21² =
  18. 18.26² =
  19. 19.14² =
  20. 20.14² =
  21. 21.17² =
  22. 22.22² =
  23. 23.15² =
  24. 24.12² =
  25. 25.26² =
  26. 26.25² =
  27. 27.25² =
  28. 28.29² =
  29. 29.23² =
  30. 30.17² =
  31. 31.23² =
  32. 32.23² =
  33. 33.29² =
  34. 34.25² =
  35. 35.12² =
  36. 36.17² =
  37. 37.27² =
  38. 38.28² =
  39. 39.14² =
  40. 40.12² =

Answer key

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

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