← 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 368 · 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. 2.79² =
  3. 3.44² =
  4. 4.76² =
  5. 5.57² =
  6. 6.74² =
  7. 7.88² =
  8. 8.77² =
  9. 9.51² =
  10. 10.38² =
  11. 11.73² =
  12. 12.54² =
  13. 13.71² =
  14. 14.48² =
  15. 15.92² =
  16. 16.91² =
  17. 17.45² =
  18. 18.33² =
  19. 19.41² =
  20. 20.43² =
  21. 21.35² =
  22. 22.52² =
  23. 23.56² =
  24. 24.78² =
  25. 25.98² =
  26. 26.37² =
  27. 27.95² =
  28. 28.81² =
  29. 29.46² =
  30. 30.61² =
  31. 31.65² =
  32. 32.62² =
  33. 33.93² =
  34. 34.49² =
  35. 35.87² =
  36. 36.47² =
  37. 37.67² =
  38. 38.96² =
  39. 39.72² =
  40. 40.84² =

Answer key

  1. 9801
  2. 6241
  3. 1936
  4. 5776
  5. 3249
  6. 5476
  7. 7744
  8. 5929
  9. 2601
  10. 1444
  11. 5329
  12. 2916
  13. 5041
  14. 2304
  15. 8464
  16. 8281
  17. 2025
  18. 1089
  19. 1681
  20. 1849
  21. 1225
  22. 2704
  23. 3136
  24. 6084
  25. 9604
  26. 1369
  27. 9025
  28. 6561
  29. 2116
  30. 3721
  31. 4225
  32. 3844
  33. 8649
  34. 2401
  35. 7569
  36. 2209
  37. 4489
  38. 9216
  39. 5184
  40. 7056

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