← 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 295 · 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. 1.77² =
  2. 2.91² =
  3. 3.71² =
  4. 4.94² =
  5. 5.65² =
  6. 6.63² =
  7. 7.74² =
  8. 8.82² =
  9. 9.48² =
  10. 10.51² =
  11. 11.59² =
  12. 12.55² =
  13. 13.42² =
  14. 14.56² =
  15. 15.68² =
  16. 16.97² =
  17. 17.41² =
  18. 18.38² =
  19. 19.46² =
  20. 20.32² =
  21. 21.98² =
  22. 22.45² =
  23. 23.57² =
  24. 24.35² =
  25. 25.36² =
  26. 26.52² =
  27. 27.83² =
  28. 28.61² =
  29. 29.49² =
  30. 30.34² =
  31. 31.86² =
  32. 32.43² =
  33. 33.73² =
  34. 34.47² =
  35. 35.84² =
  36. 36.69² =
  37. 37.96² =
  38. 38.95² =
  39. 39.44² =
  40. 40.88² =

Answer key

  1. 5929
  2. 8281
  3. 5041
  4. 8836
  5. 4225
  6. 3969
  7. 5476
  8. 6724
  9. 2304
  10. 2601
  11. 3481
  12. 3025
  13. 1764
  14. 3136
  15. 4624
  16. 9409
  17. 1681
  18. 1444
  19. 2116
  20. 1024
  21. 9604
  22. 2025
  23. 3249
  24. 1225
  25. 1296
  26. 2704
  27. 6889
  28. 3721
  29. 2401
  30. 1156
  31. 7396
  32. 1849
  33. 5329
  34. 2209
  35. 7056
  36. 4761
  37. 9216
  38. 9025
  39. 1936
  40. 7744

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