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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 962 · 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. 1.76² =
  2. 2.71² =
  3. 3.57² =
  4. 4.62² =
  5. 5.94² =
  6. 6.98² =
  7. 7.44² =
  8. 8.55² =
  9. 9.43² =
  10. 10.82² =
  11. 11.86² =
  12. 12.92² =
  13. 13.41² =
  14. 14.42² =
  15. 15.91² =
  16. 16.56² =
  17. 17.39² =
  18. 18.95² =
  19. 19.65² =
  20. 20.85² =
  21. 21.61² =
  22. 22.64² =
  23. 23.53² =
  24. 24.89² =
  25. 25.81² =
  26. 26.63² =
  27. 27.35² =
  28. 28.66² =
  29. 29.87² =
  30. 30.75² =
  31. 31.45² =
  32. 32.83² =
  33. 33.34² =
  34. 34.51² =
  35. 35.36² =
  36. 36.59² =
  37. 37.32² =
  38. 38.38² =
  39. 39.88² =
  40. 40.46² =

Answer key

  1. 5776
  2. 5041
  3. 3249
  4. 3844
  5. 8836
  6. 9604
  7. 1936
  8. 3025
  9. 1849
  10. 6724
  11. 7396
  12. 8464
  13. 1681
  14. 1764
  15. 8281
  16. 3136
  17. 1521
  18. 9025
  19. 4225
  20. 7225
  21. 3721
  22. 4096
  23. 2809
  24. 7921
  25. 6561
  26. 3969
  27. 1225
  28. 4356
  29. 7569
  30. 5625
  31. 2025
  32. 6889
  33. 1156
  34. 2601
  35. 1296
  36. 3481
  37. 1024
  38. 1444
  39. 7744
  40. 2116

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