← 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 964 · 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. 1.76² =
  2. 2.41² =
  3. 3.44² =
  4. 4.84² =
  5. 5.74² =
  6. 6.46² =
  7. 7.62² =
  8. 8.45² =
  9. 9.54² =
  10. 10.81² =
  11. 11.65² =
  12. 12.48² =
  13. 13.64² =
  14. 14.43² =
  15. 15.34² =
  16. 16.73² =
  17. 17.63² =
  18. 18.53² =
  19. 19.91² =
  20. 20.42² =
  21. 21.35² =
  22. 22.33² =
  23. 23.61² =
  24. 24.77² =
  25. 25.87² =
  26. 26.66² =
  27. 27.36² =
  28. 28.82² =
  29. 29.79² =
  30. 30.83² =
  31. 31.55² =
  32. 32.57² =
  33. 33.52² =
  34. 34.51² =
  35. 35.72² =
  36. 36.88² =
  37. 37.98² =
  38. 38.75² =
  39. 39.56² =
  40. 40.49² =

Answer key

  1. 5776
  2. 1681
  3. 1936
  4. 7056
  5. 5476
  6. 2116
  7. 3844
  8. 2025
  9. 2916
  10. 6561
  11. 4225
  12. 2304
  13. 4096
  14. 1849
  15. 1156
  16. 5329
  17. 3969
  18. 2809
  19. 8281
  20. 1764
  21. 1225
  22. 1089
  23. 3721
  24. 5929
  25. 7569
  26. 4356
  27. 1296
  28. 6724
  29. 6241
  30. 6889
  31. 3025
  32. 3249
  33. 2704
  34. 2601
  35. 5184
  36. 7744
  37. 9604
  38. 5625
  39. 3136
  40. 2401

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