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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 994 · 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. 2.27² =
  3. 3.23² =
  4. 4.15² =
  5. 5.12² =
  6. 6.28² =
  7. 7.21² =
  8. 8.25² =
  9. 9.24² =
  10. 10.16² =
  11. 11.22² =
  12. 12.19² =
  13. 13.14² =
  14. 14.18² =
  15. 15.11² =
  16. 16.26² =
  17. 17.17² =
  18. 18.12² =
  19. 19.11² =
  20. 20.26² =
  21. 21.29² =
  22. 22.11² =
  23. 23.16² =
  24. 24.11² =
  25. 25.16² =
  26. 26.26² =
  27. 27.13² =
  28. 28.26² =
  29. 29.22² =
  30. 30.14² =
  31. 31.21² =
  32. 32.13² =
  33. 33.15² =
  34. 34.18² =
  35. 35.21² =
  36. 36.25² =
  37. 37.18² =
  38. 38.26² =
  39. 39.25² =
  40. 40.28² =

Answer key

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

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