← 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 35 · 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. 1.99² =
  2. 2.85² =
  3. 3.36² =
  4. 4.92² =
  5. 5.53² =
  6. 6.81² =
  7. 7.51² =
  8. 8.44² =
  9. 9.71² =
  10. 10.48² =
  11. 11.41² =
  12. 12.37² =
  13. 13.65² =
  14. 14.84² =
  15. 15.35² =
  16. 16.83² =
  17. 17.61² =
  18. 18.46² =
  19. 19.43² =
  20. 20.52² =
  21. 21.87² =
  22. 22.95² =
  23. 23.62² =
  24. 24.66² =
  25. 25.76² =
  26. 26.89² =
  27. 27.55² =
  28. 28.64² =
  29. 29.69² =
  30. 30.79² =
  31. 31.97² =
  32. 32.45² =
  33. 33.88² =
  34. 34.54² =
  35. 35.94² =
  36. 36.73² =
  37. 37.39² =
  38. 38.31² =
  39. 39.68² =
  40. 40.82² =

Answer key

  1. 9801
  2. 7225
  3. 1296
  4. 8464
  5. 2809
  6. 6561
  7. 2601
  8. 1936
  9. 5041
  10. 2304
  11. 1681
  12. 1369
  13. 4225
  14. 7056
  15. 1225
  16. 6889
  17. 3721
  18. 2116
  19. 1849
  20. 2704
  21. 7569
  22. 9025
  23. 3844
  24. 4356
  25. 5776
  26. 7921
  27. 3025
  28. 4096
  29. 4761
  30. 6241
  31. 9409
  32. 2025
  33. 7744
  34. 2916
  35. 8836
  36. 5329
  37. 1521
  38. 961
  39. 4624
  40. 6724

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