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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 302 · 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. 1.73² =
  2. 2.65² =
  3. 3.91² =
  4. 4.87² =
  5. 5.43² =
  6. 6.75² =
  7. 7.48² =
  8. 8.32² =
  9. 9.71² =
  10. 10.34² =
  11. 11.59² =
  12. 12.76² =
  13. 13.77² =
  14. 14.81² =
  15. 15.89² =
  16. 16.61² =
  17. 17.53² =
  18. 18.68² =
  19. 19.97² =
  20. 20.33² =
  21. 21.44² =
  22. 22.51² =
  23. 23.83² =
  24. 24.78² =
  25. 25.36² =
  26. 26.52² =
  27. 27.54² =
  28. 28.82² =
  29. 29.41² =
  30. 30.74² =
  31. 31.86² =
  32. 32.38² =
  33. 33.57² =
  34. 34.98² =
  35. 35.45² =
  36. 36.93² =
  37. 37.84² =
  38. 38.46² =
  39. 39.37² =
  40. 40.62² =

Answer key

  1. 5329
  2. 4225
  3. 8281
  4. 7569
  5. 1849
  6. 5625
  7. 2304
  8. 1024
  9. 5041
  10. 1156
  11. 3481
  12. 5776
  13. 5929
  14. 6561
  15. 7921
  16. 3721
  17. 2809
  18. 4624
  19. 9409
  20. 1089
  21. 1936
  22. 2601
  23. 6889
  24. 6084
  25. 1296
  26. 2704
  27. 2916
  28. 6724
  29. 1681
  30. 5476
  31. 7396
  32. 1444
  33. 3249
  34. 9604
  35. 2025
  36. 8649
  37. 7056
  38. 2116
  39. 1369
  40. 3844

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