← 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 846 · 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. 1.96² =
  2. 2.89² =
  3. 3.55² =
  4. 4.82² =
  5. 5.64² =
  6. 6.66² =
  7. 7.37² =
  8. 8.65² =
  9. 9.97² =
  10. 10.41² =
  11. 11.83² =
  12. 12.58² =
  13. 13.87² =
  14. 14.33² =
  15. 15.77² =
  16. 16.34² =
  17. 17.78² =
  18. 18.57² =
  19. 19.31² =
  20. 20.61² =
  21. 21.74² =
  22. 22.42² =
  23. 23.47² =
  24. 24.71² =
  25. 25.86² =
  26. 26.48² =
  27. 27.69² =
  28. 28.52² =
  29. 29.51² =
  30. 30.44² =
  31. 31.73² =
  32. 32.92² =
  33. 33.75² =
  34. 34.56² =
  35. 35.81² =
  36. 36.67² =
  37. 37.91² =
  38. 38.43² =
  39. 39.53² =
  40. 40.32² =

Answer key

  1. 9216
  2. 7921
  3. 3025
  4. 6724
  5. 4096
  6. 4356
  7. 1369
  8. 4225
  9. 9409
  10. 1681
  11. 6889
  12. 3364
  13. 7569
  14. 1089
  15. 5929
  16. 1156
  17. 6084
  18. 3249
  19. 961
  20. 3721
  21. 5476
  22. 1764
  23. 2209
  24. 5041
  25. 7396
  26. 2304
  27. 4761
  28. 2704
  29. 2601
  30. 1936
  31. 5329
  32. 8464
  33. 5625
  34. 3136
  35. 6561
  36. 4489
  37. 8281
  38. 1849
  39. 2809
  40. 1024

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