← 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 133 · 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. 1.46² =
  2. 2.37² =
  3. 3.56² =
  4. 4.44² =
  5. 5.67² =
  6. 6.39² =
  7. 7.69² =
  8. 8.35² =
  9. 9.48² =
  10. 10.68² =
  11. 11.66² =
  12. 12.45² =
  13. 13.74² =
  14. 14.87² =
  15. 15.51² =
  16. 16.36² =
  17. 17.71² =
  18. 18.32² =
  19. 19.33² =
  20. 20.75² =
  21. 21.62² =
  22. 22.78² =
  23. 23.99² =
  24. 24.94² =
  25. 25.63² =
  26. 26.81² =
  27. 27.91² =
  28. 28.41² =
  29. 29.89² =
  30. 30.97² =
  31. 31.47² =
  32. 32.58² =
  33. 33.34² =
  34. 34.64² =
  35. 35.84² =
  36. 36.38² =
  37. 37.53² =
  38. 38.93² =
  39. 39.31² =
  40. 40.61² =

Answer key

  1. 2116
  2. 1369
  3. 3136
  4. 1936
  5. 4489
  6. 1521
  7. 4761
  8. 1225
  9. 2304
  10. 4624
  11. 4356
  12. 2025
  13. 5476
  14. 7569
  15. 2601
  16. 1296
  17. 5041
  18. 1024
  19. 1089
  20. 5625
  21. 3844
  22. 6084
  23. 9801
  24. 8836
  25. 3969
  26. 6561
  27. 8281
  28. 1681
  29. 7921
  30. 9409
  31. 2209
  32. 3364
  33. 1156
  34. 4096
  35. 7056
  36. 1444
  37. 2809
  38. 8649
  39. 961
  40. 3721

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