← 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 107 · 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. 1.68² =
  2. 2.52² =
  3. 3.57² =
  4. 4.45² =
  5. 5.37² =
  6. 6.77² =
  7. 7.66² =
  8. 8.94² =
  9. 9.53² =
  10. 10.41² =
  11. 11.95² =
  12. 12.49² =
  13. 13.56² =
  14. 14.87² =
  15. 15.65² =
  16. 16.42² =
  17. 17.32² =
  18. 18.88² =
  19. 19.82² =
  20. 20.64² =
  21. 21.55² =
  22. 22.81² =
  23. 23.74² =
  24. 24.33² =
  25. 25.61² =
  26. 26.51² =
  27. 27.73² =
  28. 28.91² =
  29. 29.72² =
  30. 30.84² =
  31. 31.83² =
  32. 32.54² =
  33. 33.71² =
  34. 34.67² =
  35. 35.48² =
  36. 36.99² =
  37. 37.97² =
  38. 38.96² =
  39. 39.34² =
  40. 40.38² =

Answer key

  1. 4624
  2. 2704
  3. 3249
  4. 2025
  5. 1369
  6. 5929
  7. 4356
  8. 8836
  9. 2809
  10. 1681
  11. 9025
  12. 2401
  13. 3136
  14. 7569
  15. 4225
  16. 1764
  17. 1024
  18. 7744
  19. 6724
  20. 4096
  21. 3025
  22. 6561
  23. 5476
  24. 1089
  25. 3721
  26. 2601
  27. 5329
  28. 8281
  29. 5184
  30. 7056
  31. 6889
  32. 2916
  33. 5041
  34. 4489
  35. 2304
  36. 9801
  37. 9409
  38. 9216
  39. 1156
  40. 1444

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