← 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 926 · 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. 1.51² =
  2. 2.42² =
  3. 3.98² =
  4. 4.76² =
  5. 5.61² =
  6. 6.63² =
  7. 7.33² =
  8. 8.45² =
  9. 9.56² =
  10. 10.54² =
  11. 11.91² =
  12. 12.74² =
  13. 13.72² =
  14. 14.62² =
  15. 15.95² =
  16. 16.41² =
  17. 17.58² =
  18. 18.36² =
  19. 19.86² =
  20. 20.32² =
  21. 21.47² =
  22. 22.83² =
  23. 23.46² =
  24. 24.71² =
  25. 25.55² =
  26. 26.59² =
  27. 27.78² =
  28. 28.52² =
  29. 29.92² =
  30. 30.49² =
  31. 31.96² =
  32. 32.66² =
  33. 33.94² =
  34. 34.38² =
  35. 35.88² =
  36. 36.77² =
  37. 37.75² =
  38. 38.87² =
  39. 39.44² =
  40. 40.97² =

Answer key

  1. 2601
  2. 1764
  3. 9604
  4. 5776
  5. 3721
  6. 3969
  7. 1089
  8. 2025
  9. 3136
  10. 2916
  11. 8281
  12. 5476
  13. 5184
  14. 3844
  15. 9025
  16. 1681
  17. 3364
  18. 1296
  19. 7396
  20. 1024
  21. 2209
  22. 6889
  23. 2116
  24. 5041
  25. 3025
  26. 3481
  27. 6084
  28. 2704
  29. 8464
  30. 2401
  31. 9216
  32. 4356
  33. 8836
  34. 1444
  35. 7744
  36. 5929
  37. 5625
  38. 7569
  39. 1936
  40. 9409

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