← Square any 2-digit number: up and down lesson New set →

Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 233 · 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. 1.36² =
  2. 2.34² =
  3. 3.61² =
  4. 4.62² =
  5. 5.35² =
  6. 6.55² =
  7. 7.95² =
  8. 8.63² =
  9. 9.81² =
  10. 10.52² =
  11. 11.84² =
  12. 12.94² =
  13. 13.31² =
  14. 14.75² =
  15. 15.71² =
  16. 16.96² =
  17. 17.41² =
  18. 18.51² =
  19. 19.64² =
  20. 20.48² =
  21. 21.78² =
  22. 22.73² =
  23. 23.83² =
  24. 24.66² =
  25. 25.47² =
  26. 26.87² =
  27. 27.89² =
  28. 28.92² =
  29. 29.56² =
  30. 30.93² =
  31. 31.43² =
  32. 32.91² =
  33. 33.74² =
  34. 34.69² =
  35. 35.54² =
  36. 36.86² =
  37. 37.65² =
  38. 38.46² =
  39. 39.49² =
  40. 40.39² =

Answer key

  1. 1296
  2. 1156
  3. 3721
  4. 3844
  5. 1225
  6. 3025
  7. 9025
  8. 3969
  9. 6561
  10. 2704
  11. 7056
  12. 8836
  13. 961
  14. 5625
  15. 5041
  16. 9216
  17. 1681
  18. 2601
  19. 4096
  20. 2304
  21. 6084
  22. 5329
  23. 6889
  24. 4356
  25. 2209
  26. 7569
  27. 7921
  28. 8464
  29. 3136
  30. 8649
  31. 1849
  32. 8281
  33. 5476
  34. 4761
  35. 2916
  36. 7396
  37. 4225
  38. 2116
  39. 2401
  40. 1521

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths