← 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 176 · 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. 1.74² =
  2. 2.58² =
  3. 3.31² =
  4. 4.32² =
  5. 5.56² =
  6. 6.71² =
  7. 7.82² =
  8. 8.63² =
  9. 9.33² =
  10. 10.78² =
  11. 11.89² =
  12. 12.44² =
  13. 13.66² =
  14. 14.59² =
  15. 15.64² =
  16. 16.86² =
  17. 17.84² =
  18. 18.46² =
  19. 19.48² =
  20. 20.81² =
  21. 21.54² =
  22. 22.93² =
  23. 23.41² =
  24. 24.95² =
  25. 25.47² =
  26. 26.99² =
  27. 27.75² =
  28. 28.36² =
  29. 29.91² =
  30. 30.38² =
  31. 31.98² =
  32. 32.77² =
  33. 33.85² =
  34. 34.45² =
  35. 35.52² =
  36. 36.67² =
  37. 37.35² =
  38. 38.79² =
  39. 39.76² =
  40. 40.69² =

Answer key

  1. 5476
  2. 3364
  3. 961
  4. 1024
  5. 3136
  6. 5041
  7. 6724
  8. 3969
  9. 1089
  10. 6084
  11. 7921
  12. 1936
  13. 4356
  14. 3481
  15. 4096
  16. 7396
  17. 7056
  18. 2116
  19. 2304
  20. 6561
  21. 2916
  22. 8649
  23. 1681
  24. 9025
  25. 2209
  26. 9801
  27. 5625
  28. 1296
  29. 8281
  30. 1444
  31. 9604
  32. 5929
  33. 7225
  34. 2025
  35. 2704
  36. 4489
  37. 1225
  38. 6241
  39. 5776
  40. 4761

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