← 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 748 · 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. 2.71² =
  3. 3.86² =
  4. 4.36² =
  5. 5.41² =
  6. 6.55² =
  7. 7.35² =
  8. 8.56² =
  9. 9.38² =
  10. 10.52² =
  11. 11.33² =
  12. 12.46² =
  13. 13.72² =
  14. 14.74² =
  15. 15.53² =
  16. 16.97² =
  17. 17.51² =
  18. 18.81² =
  19. 19.61² =
  20. 20.94² =
  21. 21.75² =
  22. 22.64² =
  23. 23.96² =
  24. 24.63² =
  25. 25.32² =
  26. 26.84² =
  27. 27.91² =
  28. 28.92² =
  29. 29.67² =
  30. 30.69² =
  31. 31.98² =
  32. 32.59² =
  33. 33.95² =
  34. 34.66² =
  35. 35.43² =
  36. 36.73² =
  37. 37.62² =
  38. 38.85² =
  39. 39.87² =
  40. 40.79² =

Answer key

  1. 4624
  2. 5041
  3. 7396
  4. 1296
  5. 1681
  6. 3025
  7. 1225
  8. 3136
  9. 1444
  10. 2704
  11. 1089
  12. 2116
  13. 5184
  14. 5476
  15. 2809
  16. 9409
  17. 2601
  18. 6561
  19. 3721
  20. 8836
  21. 5625
  22. 4096
  23. 9216
  24. 3969
  25. 1024
  26. 7056
  27. 8281
  28. 8464
  29. 4489
  30. 4761
  31. 9604
  32. 3481
  33. 9025
  34. 4356
  35. 1849
  36. 5329
  37. 3844
  38. 7225
  39. 7569
  40. 6241

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