← 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 325 · 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. 1.91² =
  2. 2.36² =
  3. 3.82² =
  4. 4.89² =
  5. 5.62² =
  6. 6.64² =
  7. 7.52² =
  8. 8.41² =
  9. 9.49² =
  10. 10.71² =
  11. 11.88² =
  12. 12.95² =
  13. 13.81² =
  14. 14.45² =
  15. 15.42² =
  16. 16.57² =
  17. 17.76² =
  18. 18.63² =
  19. 19.37² =
  20. 20.85² =
  21. 21.51² =
  22. 22.67² =
  23. 23.34² =
  24. 24.53² =
  25. 25.43² =
  26. 26.68² =
  27. 27.84² =
  28. 28.38² =
  29. 29.48² =
  30. 30.61² =
  31. 31.56² =
  32. 32.87² =
  33. 33.77² =
  34. 34.33² =
  35. 35.46² =
  36. 36.35² =
  37. 37.44² =
  38. 38.47² =
  39. 39.94² =
  40. 40.79² =

Answer key

  1. 8281
  2. 1296
  3. 6724
  4. 7921
  5. 3844
  6. 4096
  7. 2704
  8. 1681
  9. 2401
  10. 5041
  11. 7744
  12. 9025
  13. 6561
  14. 2025
  15. 1764
  16. 3249
  17. 5776
  18. 3969
  19. 1369
  20. 7225
  21. 2601
  22. 4489
  23. 1156
  24. 2809
  25. 1849
  26. 4624
  27. 7056
  28. 1444
  29. 2304
  30. 3721
  31. 3136
  32. 7569
  33. 5929
  34. 1089
  35. 2116
  36. 1225
  37. 1936
  38. 2209
  39. 8836
  40. 6241

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