← 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 186 · 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. 1.98² =
  2. 2.51² =
  3. 3.35² =
  4. 4.81² =
  5. 5.68² =
  6. 6.36² =
  7. 7.93² =
  8. 8.76² =
  9. 9.48² =
  10. 10.38² =
  11. 11.94² =
  12. 12.41² =
  13. 13.34² =
  14. 14.75² =
  15. 15.74² =
  16. 16.85² =
  17. 17.71² =
  18. 18.52² =
  19. 19.65² =
  20. 20.61² =
  21. 21.91² =
  22. 22.86² =
  23. 23.31² =
  24. 24.37² =
  25. 25.54² =
  26. 26.46² =
  27. 27.32² =
  28. 28.47² =
  29. 29.96² =
  30. 30.69² =
  31. 31.55² =
  32. 32.58² =
  33. 33.57² =
  34. 34.33² =
  35. 35.83² =
  36. 36.92² =
  37. 37.44² =
  38. 38.72² =
  39. 39.99² =
  40. 40.87² =

Answer key

  1. 9604
  2. 2601
  3. 1225
  4. 6561
  5. 4624
  6. 1296
  7. 8649
  8. 5776
  9. 2304
  10. 1444
  11. 8836
  12. 1681
  13. 1156
  14. 5625
  15. 5476
  16. 7225
  17. 5041
  18. 2704
  19. 4225
  20. 3721
  21. 8281
  22. 7396
  23. 961
  24. 1369
  25. 2916
  26. 2116
  27. 1024
  28. 2209
  29. 9216
  30. 4761
  31. 3025
  32. 3364
  33. 3249
  34. 1089
  35. 6889
  36. 8464
  37. 1936
  38. 5184
  39. 9801
  40. 7569

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