← 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 577 · 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. 1.86² =
  2. 2.89² =
  3. 3.66² =
  4. 4.85² =
  5. 5.38² =
  6. 6.51² =
  7. 7.97² =
  8. 8.76² =
  9. 9.46² =
  10. 10.93² =
  11. 11.35² =
  12. 12.32² =
  13. 13.81² =
  14. 14.41² =
  15. 15.91² =
  16. 16.72² =
  17. 17.96² =
  18. 18.39² =
  19. 19.77² =
  20. 20.65² =
  21. 21.61² =
  22. 22.94² =
  23. 23.68² =
  24. 24.45² =
  25. 25.47² =
  26. 26.33² =
  27. 27.79² =
  28. 28.64² =
  29. 29.43² =
  30. 30.75² =
  31. 31.63² =
  32. 32.87² =
  33. 33.31² =
  34. 34.54² =
  35. 35.55² =
  36. 36.57² =
  37. 37.99² =
  38. 38.37² =
  39. 39.53² =
  40. 40.36² =

Answer key

  1. 7396
  2. 7921
  3. 4356
  4. 7225
  5. 1444
  6. 2601
  7. 9409
  8. 5776
  9. 2116
  10. 8649
  11. 1225
  12. 1024
  13. 6561
  14. 1681
  15. 8281
  16. 5184
  17. 9216
  18. 1521
  19. 5929
  20. 4225
  21. 3721
  22. 8836
  23. 4624
  24. 2025
  25. 2209
  26. 1089
  27. 6241
  28. 4096
  29. 1849
  30. 5625
  31. 3969
  32. 7569
  33. 961
  34. 2916
  35. 3025
  36. 3249
  37. 9801
  38. 1369
  39. 2809
  40. 1296

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