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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 342 · 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. 1.79² =
  2. 2.55² =
  3. 3.72² =
  4. 4.34² =
  5. 5.54² =
  6. 6.51² =
  7. 7.84² =
  8. 8.89² =
  9. 9.91² =
  10. 10.94² =
  11. 11.88² =
  12. 12.63² =
  13. 13.58² =
  14. 14.96² =
  15. 15.87² =
  16. 16.86² =
  17. 17.92² =
  18. 18.61² =
  19. 19.83² =
  20. 20.59² =
  21. 21.75² =
  22. 22.81² =
  23. 23.35² =
  24. 24.56² =
  25. 25.47² =
  26. 26.44² =
  27. 27.93² =
  28. 28.41² =
  29. 29.38² =
  30. 30.42² =
  31. 31.71² =
  32. 32.95² =
  33. 33.73² =
  34. 34.77² =
  35. 35.66² =
  36. 36.62² =
  37. 37.48² =
  38. 38.49² =
  39. 39.64² =
  40. 40.99² =

Answer key

  1. 6241
  2. 3025
  3. 5184
  4. 1156
  5. 2916
  6. 2601
  7. 7056
  8. 7921
  9. 8281
  10. 8836
  11. 7744
  12. 3969
  13. 3364
  14. 9216
  15. 7569
  16. 7396
  17. 8464
  18. 3721
  19. 6889
  20. 3481
  21. 5625
  22. 6561
  23. 1225
  24. 3136
  25. 2209
  26. 1936
  27. 8649
  28. 1681
  29. 1444
  30. 1764
  31. 5041
  32. 9025
  33. 5329
  34. 5929
  35. 4356
  36. 3844
  37. 2304
  38. 2401
  39. 4096
  40. 9801

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