← 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 711 · 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. 1.92² =
  2. 2.58² =
  3. 3.48² =
  4. 4.51² =
  5. 5.91² =
  6. 6.43² =
  7. 7.41² =
  8. 8.36² =
  9. 9.61² =
  10. 10.98² =
  11. 11.79² =
  12. 12.63² =
  13. 13.47² =
  14. 14.75² =
  15. 15.67² =
  16. 16.35² =
  17. 17.77² =
  18. 18.76² =
  19. 19.31² =
  20. 20.64² =
  21. 21.66² =
  22. 22.88² =
  23. 23.78² =
  24. 24.84² =
  25. 25.39² =
  26. 26.54² =
  27. 27.38² =
  28. 28.86² =
  29. 29.81² =
  30. 30.83² =
  31. 31.71² =
  32. 32.52² =
  33. 33.56² =
  34. 34.87² =
  35. 35.34² =
  36. 36.97² =
  37. 37.82² =
  38. 38.94² =
  39. 39.73² =
  40. 40.46² =

Answer key

  1. 8464
  2. 3364
  3. 2304
  4. 2601
  5. 8281
  6. 1849
  7. 1681
  8. 1296
  9. 3721
  10. 9604
  11. 6241
  12. 3969
  13. 2209
  14. 5625
  15. 4489
  16. 1225
  17. 5929
  18. 5776
  19. 961
  20. 4096
  21. 4356
  22. 7744
  23. 6084
  24. 7056
  25. 1521
  26. 2916
  27. 1444
  28. 7396
  29. 6561
  30. 6889
  31. 5041
  32. 2704
  33. 3136
  34. 7569
  35. 1156
  36. 9409
  37. 6724
  38. 8836
  39. 5329
  40. 2116

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