← 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 194 · 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. 1.93² =
  2. 2.54² =
  3. 3.63² =
  4. 4.38² =
  5. 5.51² =
  6. 6.85² =
  7. 7.81² =
  8. 8.92² =
  9. 9.31² =
  10. 10.75² =
  11. 11.94² =
  12. 12.36² =
  13. 13.42² =
  14. 14.48² =
  15. 15.45² =
  16. 16.62² =
  17. 17.73² =
  18. 18.84² =
  19. 19.74² =
  20. 20.33² =
  21. 21.58² =
  22. 22.35² =
  23. 23.67² =
  24. 24.64² =
  25. 25.66² =
  26. 26.32² =
  27. 27.53² =
  28. 28.52² =
  29. 29.89² =
  30. 30.49² =
  31. 31.97² =
  32. 32.71² =
  33. 33.98² =
  34. 34.76² =
  35. 35.47² =
  36. 36.56² =
  37. 37.61² =
  38. 38.96² =
  39. 39.99² =
  40. 40.87² =

Answer key

  1. 8649
  2. 2916
  3. 3969
  4. 1444
  5. 2601
  6. 7225
  7. 6561
  8. 8464
  9. 961
  10. 5625
  11. 8836
  12. 1296
  13. 1764
  14. 2304
  15. 2025
  16. 3844
  17. 5329
  18. 7056
  19. 5476
  20. 1089
  21. 3364
  22. 1225
  23. 4489
  24. 4096
  25. 4356
  26. 1024
  27. 2809
  28. 2704
  29. 7921
  30. 2401
  31. 9409
  32. 5041
  33. 9604
  34. 5776
  35. 2209
  36. 3136
  37. 3721
  38. 9216
  39. 9801
  40. 7569

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