← 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 833 · 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. 1.56² =
  2. 2.87² =
  3. 3.33² =
  4. 4.88² =
  5. 5.53² =
  6. 6.47² =
  7. 7.37² =
  8. 8.48² =
  9. 9.78² =
  10. 10.84² =
  11. 11.36² =
  12. 12.45² =
  13. 13.96² =
  14. 14.51² =
  15. 15.81² =
  16. 16.83² =
  17. 17.41² =
  18. 18.62² =
  19. 19.91² =
  20. 20.38² =
  21. 21.71² =
  22. 22.44² =
  23. 23.55² =
  24. 24.39² =
  25. 25.98² =
  26. 26.64² =
  27. 27.31² =
  28. 28.73² =
  29. 29.85² =
  30. 30.69² =
  31. 31.32² =
  32. 32.86² =
  33. 33.99² =
  34. 34.76² =
  35. 35.49² =
  36. 36.82² =
  37. 37.72² =
  38. 38.77² =
  39. 39.89² =
  40. 40.42² =

Answer key

  1. 3136
  2. 7569
  3. 1089
  4. 7744
  5. 2809
  6. 2209
  7. 1369
  8. 2304
  9. 6084
  10. 7056
  11. 1296
  12. 2025
  13. 9216
  14. 2601
  15. 6561
  16. 6889
  17. 1681
  18. 3844
  19. 8281
  20. 1444
  21. 5041
  22. 1936
  23. 3025
  24. 1521
  25. 9604
  26. 4096
  27. 961
  28. 5329
  29. 7225
  30. 4761
  31. 1024
  32. 7396
  33. 9801
  34. 5776
  35. 2401
  36. 6724
  37. 5184
  38. 5929
  39. 7921
  40. 1764

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