← 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 783 · 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. 1.56² =
  2. 2.71² =
  3. 3.37² =
  4. 4.35² =
  5. 5.61² =
  6. 6.68² =
  7. 7.42² =
  8. 8.63² =
  9. 9.51² =
  10. 10.67² =
  11. 11.88² =
  12. 12.74² =
  13. 13.89² =
  14. 14.69² =
  15. 15.77² =
  16. 16.86² =
  17. 17.97² =
  18. 18.95² =
  19. 19.78² =
  20. 20.44² =
  21. 21.53² =
  22. 22.94² =
  23. 23.46² =
  24. 24.41² =
  25. 25.49² =
  26. 26.72² =
  27. 27.81² =
  28. 28.47² =
  29. 29.55² =
  30. 30.66² =
  31. 31.43² =
  32. 32.83² =
  33. 33.36² =
  34. 34.54² =
  35. 35.84² =
  36. 36.73² =
  37. 37.45² =
  38. 38.79² =
  39. 39.39² =
  40. 40.59² =

Answer key

  1. 3136
  2. 5041
  3. 1369
  4. 1225
  5. 3721
  6. 4624
  7. 1764
  8. 3969
  9. 2601
  10. 4489
  11. 7744
  12. 5476
  13. 7921
  14. 4761
  15. 5929
  16. 7396
  17. 9409
  18. 9025
  19. 6084
  20. 1936
  21. 2809
  22. 8836
  23. 2116
  24. 1681
  25. 2401
  26. 5184
  27. 6561
  28. 2209
  29. 3025
  30. 4356
  31. 1849
  32. 6889
  33. 1296
  34. 2916
  35. 7056
  36. 5329
  37. 2025
  38. 6241
  39. 1521
  40. 3481

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