← 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 675 · 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. 1.97² =
  2. 2.93² =
  3. 3.33² =
  4. 4.55² =
  5. 5.49² =
  6. 6.83² =
  7. 7.57² =
  8. 8.38² =
  9. 9.62² =
  10. 10.86² =
  11. 11.59² =
  12. 12.75² =
  13. 13.66² =
  14. 14.61² =
  15. 15.96² =
  16. 16.91² =
  17. 17.43² =
  18. 18.65² =
  19. 19.56² =
  20. 20.34² =
  21. 21.82² =
  22. 22.77² =
  23. 23.98² =
  24. 24.41² =
  25. 25.51² =
  26. 26.52² =
  27. 27.32² =
  28. 28.68² =
  29. 29.81² =
  30. 30.58² =
  31. 31.47² =
  32. 32.76² =
  33. 33.45² =
  34. 34.99² =
  35. 35.64² =
  36. 36.89² =
  37. 37.63² =
  38. 38.42² =
  39. 39.74² =
  40. 40.87² =

Answer key

  1. 9409
  2. 8649
  3. 1089
  4. 3025
  5. 2401
  6. 6889
  7. 3249
  8. 1444
  9. 3844
  10. 7396
  11. 3481
  12. 5625
  13. 4356
  14. 3721
  15. 9216
  16. 8281
  17. 1849
  18. 4225
  19. 3136
  20. 1156
  21. 6724
  22. 5929
  23. 9604
  24. 1681
  25. 2601
  26. 2704
  27. 1024
  28. 4624
  29. 6561
  30. 3364
  31. 2209
  32. 5776
  33. 2025
  34. 9801
  35. 4096
  36. 7921
  37. 3969
  38. 1764
  39. 5476
  40. 7569

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