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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 102 · 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. 1.41² =
  2. 2.64² =
  3. 3.51² =
  4. 4.38² =
  5. 5.77² =
  6. 6.87² =
  7. 7.43² =
  8. 8.81² =
  9. 9.73² =
  10. 10.33² =
  11. 11.82² =
  12. 12.61² =
  13. 13.74² =
  14. 14.63² =
  15. 15.76² =
  16. 16.62² =
  17. 17.83² =
  18. 18.99² =
  19. 19.84² =
  20. 20.91² =
  21. 21.32² =
  22. 22.71² =
  23. 23.89² =
  24. 24.54² =
  25. 25.88² =
  26. 26.97² =
  27. 27.58² =
  28. 28.35² =
  29. 29.78² =
  30. 30.98² =
  31. 31.79² =
  32. 32.37² =
  33. 33.42² =
  34. 34.95² =
  35. 35.92² =
  36. 36.55² =
  37. 37.86² =
  38. 38.72² =
  39. 39.46² =
  40. 40.56² =

Answer key

  1. 1681
  2. 4096
  3. 2601
  4. 1444
  5. 5929
  6. 7569
  7. 1849
  8. 6561
  9. 5329
  10. 1089
  11. 6724
  12. 3721
  13. 5476
  14. 3969
  15. 5776
  16. 3844
  17. 6889
  18. 9801
  19. 7056
  20. 8281
  21. 1024
  22. 5041
  23. 7921
  24. 2916
  25. 7744
  26. 9409
  27. 3364
  28. 1225
  29. 6084
  30. 9604
  31. 6241
  32. 1369
  33. 1764
  34. 9025
  35. 8464
  36. 3025
  37. 7396
  38. 5184
  39. 2116
  40. 3136

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