← 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 273 · 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. 1.64² =
  2. 2.63² =
  3. 3.93² =
  4. 4.61² =
  5. 5.73² =
  6. 6.34² =
  7. 7.37² =
  8. 8.83² =
  9. 9.65² =
  10. 10.79² =
  11. 11.56² =
  12. 12.94² =
  13. 13.59² =
  14. 14.36² =
  15. 15.39² =
  16. 16.97² =
  17. 17.53² =
  18. 18.44² =
  19. 19.41² =
  20. 20.32² =
  21. 21.75² =
  22. 22.78² =
  23. 23.96² =
  24. 24.31² =
  25. 25.54² =
  26. 26.43² =
  27. 27.95² =
  28. 28.82² =
  29. 29.66² =
  30. 30.91² =
  31. 31.88² =
  32. 32.51² =
  33. 33.81² =
  34. 34.45² =
  35. 35.35² =
  36. 36.68² =
  37. 37.92² =
  38. 38.71² =
  39. 39.48² =
  40. 40.76² =

Answer key

  1. 4096
  2. 3969
  3. 8649
  4. 3721
  5. 5329
  6. 1156
  7. 1369
  8. 6889
  9. 4225
  10. 6241
  11. 3136
  12. 8836
  13. 3481
  14. 1296
  15. 1521
  16. 9409
  17. 2809
  18. 1936
  19. 1681
  20. 1024
  21. 5625
  22. 6084
  23. 9216
  24. 961
  25. 2916
  26. 1849
  27. 9025
  28. 6724
  29. 4356
  30. 8281
  31. 7744
  32. 2601
  33. 6561
  34. 2025
  35. 1225
  36. 4624
  37. 8464
  38. 5041
  39. 2304
  40. 5776

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