← 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 741 · 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. 1.71² =
  2. 2.37² =
  3. 3.38² =
  4. 4.69² =
  5. 5.93² =
  6. 6.84² =
  7. 7.59² =
  8. 8.88² =
  9. 9.39² =
  10. 10.67² =
  11. 11.31² =
  12. 12.46² =
  13. 13.54² =
  14. 14.73² =
  15. 15.68² =
  16. 16.34² =
  17. 17.98² =
  18. 18.86² =
  19. 19.33² =
  20. 20.79² =
  21. 21.41² =
  22. 22.96² =
  23. 23.58² =
  24. 24.57² =
  25. 25.48² =
  26. 26.51² =
  27. 27.89² =
  28. 28.55² =
  29. 29.66² =
  30. 30.87² =
  31. 31.63² =
  32. 32.44² =
  33. 33.92² =
  34. 34.61² =
  35. 35.65² =
  36. 36.72² =
  37. 37.64² =
  38. 38.81² =
  39. 39.77² =
  40. 40.94² =

Answer key

  1. 5041
  2. 1369
  3. 1444
  4. 4761
  5. 8649
  6. 7056
  7. 3481
  8. 7744
  9. 1521
  10. 4489
  11. 961
  12. 2116
  13. 2916
  14. 5329
  15. 4624
  16. 1156
  17. 9604
  18. 7396
  19. 1089
  20. 6241
  21. 1681
  22. 9216
  23. 3364
  24. 3249
  25. 2304
  26. 2601
  27. 7921
  28. 3025
  29. 4356
  30. 7569
  31. 3969
  32. 1936
  33. 8464
  34. 3721
  35. 4225
  36. 5184
  37. 4096
  38. 6561
  39. 5929
  40. 8836

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