← 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 36 · 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. 1.31² =
  2. 2.68² =
  3. 3.72² =
  4. 4.51² =
  5. 5.74² =
  6. 6.83² =
  7. 7.73² =
  8. 8.57² =
  9. 9.95² =
  10. 10.69² =
  11. 11.37² =
  12. 12.59² =
  13. 13.63² =
  14. 14.53² =
  15. 15.71² =
  16. 16.79² =
  17. 17.81² =
  18. 18.84² =
  19. 19.33² =
  20. 20.93² =
  21. 21.94² =
  22. 22.41² =
  23. 23.61² =
  24. 24.85² =
  25. 25.36² =
  26. 26.98² =
  27. 27.91² =
  28. 28.35² =
  29. 29.46² =
  30. 30.88² =
  31. 31.82² =
  32. 32.66² =
  33. 33.39² =
  34. 34.42² =
  35. 35.38² =
  36. 36.77² =
  37. 37.89² =
  38. 38.87² =
  39. 39.34² =
  40. 40.96² =

Answer key

  1. 961
  2. 4624
  3. 5184
  4. 2601
  5. 5476
  6. 6889
  7. 5329
  8. 3249
  9. 9025
  10. 4761
  11. 1369
  12. 3481
  13. 3969
  14. 2809
  15. 5041
  16. 6241
  17. 6561
  18. 7056
  19. 1089
  20. 8649
  21. 8836
  22. 1681
  23. 3721
  24. 7225
  25. 1296
  26. 9604
  27. 8281
  28. 1225
  29. 2116
  30. 7744
  31. 6724
  32. 4356
  33. 1521
  34. 1764
  35. 1444
  36. 5929
  37. 7921
  38. 7569
  39. 1156
  40. 9216

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