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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 812 · 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. 2.73² =
  3. 3.32² =
  4. 4.75² =
  5. 5.52² =
  6. 6.83² =
  7. 7.47² =
  8. 8.49² =
  9. 9.91² =
  10. 10.64² =
  11. 11.51² =
  12. 12.57² =
  13. 13.84² =
  14. 14.43² =
  15. 15.44² =
  16. 16.46² =
  17. 17.48² =
  18. 18.99² =
  19. 19.41² =
  20. 20.37² =
  21. 21.34² =
  22. 22.42² =
  23. 23.85² =
  24. 24.65² =
  25. 25.79² =
  26. 26.71² =
  27. 27.94² =
  28. 28.98² =
  29. 29.38² =
  30. 30.61² =
  31. 31.88² =
  32. 32.58² =
  33. 33.89² =
  34. 34.45² =
  35. 35.96² =
  36. 36.54² =
  37. 37.53² =
  38. 38.66² =
  39. 39.59² =
  40. 40.92² =

Answer key

  1. 5476
  2. 5329
  3. 1024
  4. 5625
  5. 2704
  6. 6889
  7. 2209
  8. 2401
  9. 8281
  10. 4096
  11. 2601
  12. 3249
  13. 7056
  14. 1849
  15. 1936
  16. 2116
  17. 2304
  18. 9801
  19. 1681
  20. 1369
  21. 1156
  22. 1764
  23. 7225
  24. 4225
  25. 6241
  26. 5041
  27. 8836
  28. 9604
  29. 1444
  30. 3721
  31. 7744
  32. 3364
  33. 7921
  34. 2025
  35. 9216
  36. 2916
  37. 2809
  38. 4356
  39. 3481
  40. 8464

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