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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 966 · 40 questions
TalentJR

How to do it in your head (Up and down): Find how far the number is from the nearest ten (the distance). Go that distance up and the same distance down, and multiply the two new numbers. Add the distance squared.

NameDateTime takenScore ___ / 40
  1. 1.43² =
  2. 2.42² =
  3. 3.95² =
  4. 4.75² =
  5. 5.71² =
  6. 6.84² =
  7. 7.85² =
  8. 8.35² =
  9. 9.47² =
  10. 10.78² =
  11. 11.87² =
  12. 12.57² =
  13. 13.36² =
  14. 14.52² =
  15. 15.41² =
  16. 16.96² =
  17. 17.74² =
  18. 18.56² =
  19. 19.99² =
  20. 20.64² =
  21. 21.45² =
  22. 22.58² =
  23. 23.66² =
  24. 24.51² =
  25. 25.34² =
  26. 26.33² =
  27. 27.94² =
  28. 28.82² =
  29. 29.81² =
  30. 30.61² =
  31. 31.39² =
  32. 32.91² =
  33. 33.53² =
  34. 34.88² =
  35. 35.77² =
  36. 36.93² =
  37. 37.55² =
  38. 38.98² =
  39. 39.76² =
  40. 40.68² =

Answer key

  1. 1849
  2. 1764
  3. 9025
  4. 5625
  5. 5041
  6. 7056
  7. 7225
  8. 1225
  9. 2209
  10. 6084
  11. 7569
  12. 3249
  13. 1296
  14. 2704
  15. 1681
  16. 9216
  17. 5476
  18. 3136
  19. 9801
  20. 4096
  21. 2025
  22. 3364
  23. 4356
  24. 2601
  25. 1156
  26. 1089
  27. 8836
  28. 6724
  29. 6561
  30. 3721
  31. 1521
  32. 8281
  33. 2809
  34. 7744
  35. 5929
  36. 8649
  37. 3025
  38. 9604
  39. 5776
  40. 4624

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