← 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 467 · 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. 2.92² =
  3. 3.41² =
  4. 4.33² =
  5. 5.49² =
  6. 6.71² =
  7. 7.76² =
  8. 8.69² =
  9. 9.97² =
  10. 10.98² =
  11. 11.46² =
  12. 12.67² =
  13. 13.47² =
  14. 14.77² =
  15. 15.62² =
  16. 16.82² =
  17. 17.32² =
  18. 18.35² =
  19. 19.48² =
  20. 20.88² =
  21. 21.83² =
  22. 22.51² =
  23. 23.95² =
  24. 24.68² =
  25. 25.79² =
  26. 26.38² =
  27. 27.75² =
  28. 28.43² =
  29. 29.39² =
  30. 30.59² =
  31. 31.73² =
  32. 32.91² =
  33. 33.61² =
  34. 34.37² =
  35. 35.66² =
  36. 36.56² =
  37. 37.81² =
  38. 38.42² =
  39. 39.31² =
  40. 40.55² =

Answer key

  1. 5476
  2. 8464
  3. 1681
  4. 1089
  5. 2401
  6. 5041
  7. 5776
  8. 4761
  9. 9409
  10. 9604
  11. 2116
  12. 4489
  13. 2209
  14. 5929
  15. 3844
  16. 6724
  17. 1024
  18. 1225
  19. 2304
  20. 7744
  21. 6889
  22. 2601
  23. 9025
  24. 4624
  25. 6241
  26. 1444
  27. 5625
  28. 1849
  29. 1521
  30. 3481
  31. 5329
  32. 8281
  33. 3721
  34. 1369
  35. 4356
  36. 3136
  37. 6561
  38. 1764
  39. 961
  40. 3025

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