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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 159 · 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. 1.32² =
  2. 2.58² =
  3. 3.87² =
  4. 4.71² =
  5. 5.46² =
  6. 6.49² =
  7. 7.45² =
  8. 8.39² =
  9. 9.44² =
  10. 10.41² =
  11. 11.66² =
  12. 12.42² =
  13. 13.78² =
  14. 14.38² =
  15. 15.77² =
  16. 16.79² =
  17. 17.74² =
  18. 18.96² =
  19. 19.83² =
  20. 20.55² =
  21. 21.75² =
  22. 22.91² =
  23. 23.63² =
  24. 24.89² =
  25. 25.73² =
  26. 26.94² =
  27. 27.86² =
  28. 28.53² =
  29. 29.54² =
  30. 30.33² =
  31. 31.81² =
  32. 32.64² =
  33. 33.84² =
  34. 34.61² =
  35. 35.82² =
  36. 36.62² =
  37. 37.93² =
  38. 38.51² =
  39. 39.92² =
  40. 40.52² =

Answer key

  1. 1024
  2. 3364
  3. 7569
  4. 5041
  5. 2116
  6. 2401
  7. 2025
  8. 1521
  9. 1936
  10. 1681
  11. 4356
  12. 1764
  13. 6084
  14. 1444
  15. 5929
  16. 6241
  17. 5476
  18. 9216
  19. 6889
  20. 3025
  21. 5625
  22. 8281
  23. 3969
  24. 7921
  25. 5329
  26. 8836
  27. 7396
  28. 2809
  29. 2916
  30. 1089
  31. 6561
  32. 4096
  33. 7056
  34. 3721
  35. 6724
  36. 3844
  37. 8649
  38. 2601
  39. 8464
  40. 2704

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