← 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 737 · 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. 1.69² =
  2. 2.89² =
  3. 3.96² =
  4. 4.33² =
  5. 5.99² =
  6. 6.95² =
  7. 7.59² =
  8. 8.71² =
  9. 9.64² =
  10. 10.44² =
  11. 11.91² =
  12. 12.63² =
  13. 13.46² =
  14. 14.43² =
  15. 15.38² =
  16. 16.86² =
  17. 17.81² =
  18. 18.73² =
  19. 19.41² =
  20. 20.72² =
  21. 21.45² =
  22. 22.93² =
  23. 23.39² =
  24. 24.51² =
  25. 25.98² =
  26. 26.61² =
  27. 27.67² =
  28. 28.85² =
  29. 29.83² =
  30. 30.65² =
  31. 31.42² =
  32. 32.36² =
  33. 33.58² =
  34. 34.62² =
  35. 35.57² =
  36. 36.97² =
  37. 37.79² =
  38. 38.53² =
  39. 39.34² =
  40. 40.55² =

Answer key

  1. 4761
  2. 7921
  3. 9216
  4. 1089
  5. 9801
  6. 9025
  7. 3481
  8. 5041
  9. 4096
  10. 1936
  11. 8281
  12. 3969
  13. 2116
  14. 1849
  15. 1444
  16. 7396
  17. 6561
  18. 5329
  19. 1681
  20. 5184
  21. 2025
  22. 8649
  23. 1521
  24. 2601
  25. 9604
  26. 3721
  27. 4489
  28. 7225
  29. 6889
  30. 4225
  31. 1764
  32. 1296
  33. 3364
  34. 3844
  35. 3249
  36. 9409
  37. 6241
  38. 2809
  39. 1156
  40. 3025

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