← 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 807 · 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. 1.87² =
  2. 2.72² =
  3. 3.95² =
  4. 4.38² =
  5. 5.48² =
  6. 6.52² =
  7. 7.44² =
  8. 8.62² =
  9. 9.69² =
  10. 10.66² =
  11. 11.94² =
  12. 12.42² =
  13. 13.49² =
  14. 14.34² =
  15. 15.96² =
  16. 16.79² =
  17. 17.68² =
  18. 18.88² =
  19. 19.75² =
  20. 20.67² =
  21. 21.84² =
  22. 22.82² =
  23. 23.36² =
  24. 24.51² =
  25. 25.33² =
  26. 26.92² =
  27. 27.32² =
  28. 28.58² =
  29. 29.59² =
  30. 30.53² =
  31. 31.55² =
  32. 32.86² =
  33. 33.56² =
  34. 34.99² =
  35. 35.91² =
  36. 36.65² =
  37. 37.57² =
  38. 38.77² =
  39. 39.83² =
  40. 40.73² =

Answer key

  1. 7569
  2. 5184
  3. 9025
  4. 1444
  5. 2304
  6. 2704
  7. 1936
  8. 3844
  9. 4761
  10. 4356
  11. 8836
  12. 1764
  13. 2401
  14. 1156
  15. 9216
  16. 6241
  17. 4624
  18. 7744
  19. 5625
  20. 4489
  21. 7056
  22. 6724
  23. 1296
  24. 2601
  25. 1089
  26. 8464
  27. 1024
  28. 3364
  29. 3481
  30. 2809
  31. 3025
  32. 7396
  33. 3136
  34. 9801
  35. 8281
  36. 4225
  37. 3249
  38. 5929
  39. 6889
  40. 5329

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