← 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 104 · 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. 1.63² =
  2. 2.74² =
  3. 3.43² =
  4. 4.51² =
  5. 5.31² =
  6. 6.45² =
  7. 7.44² =
  8. 8.75² =
  9. 9.59² =
  10. 10.71² =
  11. 11.48² =
  12. 12.82² =
  13. 13.99² =
  14. 14.57² =
  15. 15.78² =
  16. 16.33² =
  17. 17.32² =
  18. 18.61² =
  19. 19.79² =
  20. 20.62² =
  21. 21.37² =
  22. 22.91² =
  23. 23.67² =
  24. 24.34² =
  25. 25.64² =
  26. 26.84² =
  27. 27.68² =
  28. 28.77² =
  29. 29.85² =
  30. 30.96² =
  31. 31.54² =
  32. 32.69² =
  33. 33.86² =
  34. 34.89² =
  35. 35.41² =
  36. 36.35² =
  37. 37.72² =
  38. 38.42² =
  39. 39.93² =
  40. 40.98² =

Answer key

  1. 3969
  2. 5476
  3. 1849
  4. 2601
  5. 961
  6. 2025
  7. 1936
  8. 5625
  9. 3481
  10. 5041
  11. 2304
  12. 6724
  13. 9801
  14. 3249
  15. 6084
  16. 1089
  17. 1024
  18. 3721
  19. 6241
  20. 3844
  21. 1369
  22. 8281
  23. 4489
  24. 1156
  25. 4096
  26. 7056
  27. 4624
  28. 5929
  29. 7225
  30. 9216
  31. 2916
  32. 4761
  33. 7396
  34. 7921
  35. 1681
  36. 1225
  37. 5184
  38. 1764
  39. 8649
  40. 9604

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