← 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 82 · 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. 1.82² =
  2. 2.49² =
  3. 3.79² =
  4. 4.85² =
  5. 5.38² =
  6. 6.48² =
  7. 7.46² =
  8. 8.73² =
  9. 9.78² =
  10. 10.81² =
  11. 11.32² =
  12. 12.89² =
  13. 13.34² =
  14. 14.41² =
  15. 15.97² =
  16. 16.87² =
  17. 17.58² =
  18. 18.83² =
  19. 19.51² =
  20. 20.45² =
  21. 21.92² =
  22. 22.84² =
  23. 23.52² =
  24. 24.75² =
  25. 25.44² =
  26. 26.62² =
  27. 27.99² =
  28. 28.33² =
  29. 29.76² =
  30. 30.35² =
  31. 31.42² =
  32. 32.61² =
  33. 33.74² =
  34. 34.53² =
  35. 35.64² =
  36. 36.72² =
  37. 37.71² =
  38. 38.67² =
  39. 39.88² =
  40. 40.54² =

Answer key

  1. 6724
  2. 2401
  3. 6241
  4. 7225
  5. 1444
  6. 2304
  7. 2116
  8. 5329
  9. 6084
  10. 6561
  11. 1024
  12. 7921
  13. 1156
  14. 1681
  15. 9409
  16. 7569
  17. 3364
  18. 6889
  19. 2601
  20. 2025
  21. 8464
  22. 7056
  23. 2704
  24. 5625
  25. 1936
  26. 3844
  27. 9801
  28. 1089
  29. 5776
  30. 1225
  31. 1764
  32. 3721
  33. 5476
  34. 2809
  35. 4096
  36. 5184
  37. 5041
  38. 4489
  39. 7744
  40. 2916

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