← 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 181 · 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. 1.58² =
  2. 2.47² =
  3. 3.98² =
  4. 4.44² =
  5. 5.45² =
  6. 6.85² =
  7. 7.61² =
  8. 8.83² =
  9. 9.51² =
  10. 10.79² =
  11. 11.81² =
  12. 12.52² =
  13. 13.59² =
  14. 14.56² =
  15. 15.72² =
  16. 16.41² =
  17. 17.49² =
  18. 18.78² =
  19. 19.33² =
  20. 20.88² =
  21. 21.48² =
  22. 22.71² =
  23. 23.73² =
  24. 24.32² =
  25. 25.82² =
  26. 26.75² =
  27. 27.77² =
  28. 28.54² =
  29. 29.87² =
  30. 30.42² =
  31. 31.31² =
  32. 32.62² =
  33. 33.34² =
  34. 34.66² =
  35. 35.89² =
  36. 36.39² =
  37. 37.65² =
  38. 38.38² =
  39. 39.69² =
  40. 40.92² =

Answer key

  1. 3364
  2. 2209
  3. 9604
  4. 1936
  5. 2025
  6. 7225
  7. 3721
  8. 6889
  9. 2601
  10. 6241
  11. 6561
  12. 2704
  13. 3481
  14. 3136
  15. 5184
  16. 1681
  17. 2401
  18. 6084
  19. 1089
  20. 7744
  21. 2304
  22. 5041
  23. 5329
  24. 1024
  25. 6724
  26. 5625
  27. 5929
  28. 2916
  29. 7569
  30. 1764
  31. 961
  32. 3844
  33. 1156
  34. 4356
  35. 7921
  36. 1521
  37. 4225
  38. 1444
  39. 4761
  40. 8464

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