← 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 386 · 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. 1.87² =
  2. 2.36² =
  3. 3.71² =
  4. 4.47² =
  5. 5.83² =
  6. 6.73² =
  7. 7.98² =
  8. 8.37² =
  9. 9.46² =
  10. 10.88² =
  11. 11.77² =
  12. 12.93² =
  13. 13.54² =
  14. 14.79² =
  15. 15.69² =
  16. 16.84² =
  17. 17.42² =
  18. 18.33² =
  19. 19.31² =
  20. 20.64² =
  21. 21.51² =
  22. 22.56² =
  23. 23.43² =
  24. 24.41² =
  25. 25.91² =
  26. 26.74² =
  27. 27.66² =
  28. 28.49² =
  29. 29.85² =
  30. 30.67² =
  31. 31.32² =
  32. 32.82² =
  33. 33.89² =
  34. 34.59² =
  35. 35.96² =
  36. 36.53² =
  37. 37.68² =
  38. 38.63² =
  39. 39.45² =
  40. 40.48² =

Answer key

  1. 7569
  2. 1296
  3. 5041
  4. 2209
  5. 6889
  6. 5329
  7. 9604
  8. 1369
  9. 2116
  10. 7744
  11. 5929
  12. 8649
  13. 2916
  14. 6241
  15. 4761
  16. 7056
  17. 1764
  18. 1089
  19. 961
  20. 4096
  21. 2601
  22. 3136
  23. 1849
  24. 1681
  25. 8281
  26. 5476
  27. 4356
  28. 2401
  29. 7225
  30. 4489
  31. 1024
  32. 6724
  33. 7921
  34. 3481
  35. 9216
  36. 2809
  37. 4624
  38. 3969
  39. 2025
  40. 2304

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