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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 533 · 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. 1.93² =
  2. 2.44² =
  3. 3.98² =
  4. 4.79² =
  5. 5.61² =
  6. 6.47² =
  7. 7.92² =
  8. 8.81² =
  9. 9.38² =
  10. 10.96² =
  11. 11.36² =
  12. 12.58² =
  13. 13.48² =
  14. 14.71² =
  15. 15.63² =
  16. 16.73² =
  17. 17.33² =
  18. 18.91² =
  19. 19.42² =
  20. 20.32² =
  21. 21.94² =
  22. 22.35² =
  23. 23.65² =
  24. 24.89² =
  25. 25.68² =
  26. 26.85² =
  27. 27.46² =
  28. 28.43² =
  29. 29.51² =
  30. 30.56² =
  31. 31.77² =
  32. 32.84² =
  33. 33.82² =
  34. 34.78² =
  35. 35.83² =
  36. 36.75² =
  37. 37.41² =
  38. 38.59² =
  39. 39.99² =
  40. 40.97² =

Answer key

  1. 8649
  2. 1936
  3. 9604
  4. 6241
  5. 3721
  6. 2209
  7. 8464
  8. 6561
  9. 1444
  10. 9216
  11. 1296
  12. 3364
  13. 2304
  14. 5041
  15. 3969
  16. 5329
  17. 1089
  18. 8281
  19. 1764
  20. 1024
  21. 8836
  22. 1225
  23. 4225
  24. 7921
  25. 4624
  26. 7225
  27. 2116
  28. 1849
  29. 2601
  30. 3136
  31. 5929
  32. 7056
  33. 6724
  34. 6084
  35. 6889
  36. 5625
  37. 1681
  38. 3481
  39. 9801
  40. 9409

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