← 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 727 · 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. 1.81² =
  2. 2.93² =
  3. 3.37² =
  4. 4.71² =
  5. 5.74² =
  6. 6.76² =
  7. 7.97² =
  8. 8.36² =
  9. 9.79² =
  10. 10.52² =
  11. 11.99² =
  12. 12.98² =
  13. 13.57² =
  14. 14.92² =
  15. 15.85² =
  16. 16.88² =
  17. 17.42² =
  18. 18.38² =
  19. 19.63² =
  20. 20.55² =
  21. 21.61² =
  22. 22.58² =
  23. 23.41² =
  24. 24.82² =
  25. 25.87² =
  26. 26.35² =
  27. 27.47² =
  28. 28.78² =
  29. 29.54² =
  30. 30.46² =
  31. 31.32² =
  32. 32.39² =
  33. 33.48² =
  34. 34.33² =
  35. 35.72² =
  36. 36.86² =
  37. 37.67² =
  38. 38.51² =
  39. 39.69² =
  40. 40.56² =

Answer key

  1. 6561
  2. 8649
  3. 1369
  4. 5041
  5. 5476
  6. 5776
  7. 9409
  8. 1296
  9. 6241
  10. 2704
  11. 9801
  12. 9604
  13. 3249
  14. 8464
  15. 7225
  16. 7744
  17. 1764
  18. 1444
  19. 3969
  20. 3025
  21. 3721
  22. 3364
  23. 1681
  24. 6724
  25. 7569
  26. 1225
  27. 2209
  28. 6084
  29. 2916
  30. 2116
  31. 1024
  32. 1521
  33. 2304
  34. 1089
  35. 5184
  36. 7396
  37. 4489
  38. 2601
  39. 4761
  40. 3136

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