← 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 806 · 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. 2.98² =
  3. 3.45² =
  4. 4.57² =
  5. 5.96² =
  6. 6.71² =
  7. 7.83² =
  8. 8.74² =
  9. 9.49² =
  10. 10.52² =
  11. 11.62² =
  12. 12.54² =
  13. 13.53² =
  14. 14.63² =
  15. 15.61² =
  16. 16.47² =
  17. 17.41² =
  18. 18.97² =
  19. 19.85² =
  20. 20.65² =
  21. 21.73² =
  22. 22.77² =
  23. 23.68² =
  24. 24.44² =
  25. 25.79² =
  26. 26.91² =
  27. 27.92² =
  28. 28.34² =
  29. 29.64² =
  30. 30.35² =
  31. 31.78² =
  32. 32.51² =
  33. 33.42² =
  34. 34.56² =
  35. 35.81² =
  36. 36.88² =
  37. 37.38² =
  38. 38.75² =
  39. 39.86² =
  40. 40.82² =

Answer key

  1. 5776
  2. 9604
  3. 2025
  4. 3249
  5. 9216
  6. 5041
  7. 6889
  8. 5476
  9. 2401
  10. 2704
  11. 3844
  12. 2916
  13. 2809
  14. 3969
  15. 3721
  16. 2209
  17. 1681
  18. 9409
  19. 7225
  20. 4225
  21. 5329
  22. 5929
  23. 4624
  24. 1936
  25. 6241
  26. 8281
  27. 8464
  28. 1156
  29. 4096
  30. 1225
  31. 6084
  32. 2601
  33. 1764
  34. 3136
  35. 6561
  36. 7744
  37. 1444
  38. 5625
  39. 7396
  40. 6724

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