← 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 105 · 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. 1.87² =
  2. 2.33² =
  3. 3.55² =
  4. 4.68² =
  5. 5.95² =
  6. 6.43² =
  7. 7.54² =
  8. 8.75² =
  9. 9.93² =
  10. 10.47² =
  11. 11.61² =
  12. 12.37² =
  13. 13.94² =
  14. 14.96² =
  15. 15.44² =
  16. 16.59² =
  17. 17.69² =
  18. 18.45² =
  19. 19.65² =
  20. 20.57² =
  21. 21.88² =
  22. 22.39² =
  23. 23.76² =
  24. 24.64² =
  25. 25.35² =
  26. 26.83² =
  27. 27.71² =
  28. 28.46² =
  29. 29.66² =
  30. 30.48² =
  31. 31.91² =
  32. 32.97² =
  33. 33.84² =
  34. 34.79² =
  35. 35.41² =
  36. 36.74² =
  37. 37.78² =
  38. 38.34² =
  39. 39.73² =
  40. 40.72² =

Answer key

  1. 7569
  2. 1089
  3. 3025
  4. 4624
  5. 9025
  6. 1849
  7. 2916
  8. 5625
  9. 8649
  10. 2209
  11. 3721
  12. 1369
  13. 8836
  14. 9216
  15. 1936
  16. 3481
  17. 4761
  18. 2025
  19. 4225
  20. 3249
  21. 7744
  22. 1521
  23. 5776
  24. 4096
  25. 1225
  26. 6889
  27. 5041
  28. 2116
  29. 4356
  30. 2304
  31. 8281
  32. 9409
  33. 7056
  34. 6241
  35. 1681
  36. 5476
  37. 6084
  38. 1156
  39. 5329
  40. 5184

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