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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 48 · 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. 1.34² =
  2. 2.63² =
  3. 3.69² =
  4. 4.92² =
  5. 5.61² =
  6. 6.79² =
  7. 7.39² =
  8. 8.93² =
  9. 9.68² =
  10. 10.85² =
  11. 11.99² =
  12. 12.83² =
  13. 13.98² =
  14. 14.95² =
  15. 15.55² =
  16. 16.86² =
  17. 17.88² =
  18. 18.37² =
  19. 19.52² =
  20. 20.87² =
  21. 21.43² =
  22. 22.59² =
  23. 23.54² =
  24. 24.74² =
  25. 25.91² =
  26. 26.47² =
  27. 27.42² =
  28. 28.41² =
  29. 29.64² =
  30. 30.36² =
  31. 31.81² =
  32. 32.32² =
  33. 33.57² =
  34. 34.58² =
  35. 35.33² =
  36. 36.67² =
  37. 37.44² =
  38. 38.51² =
  39. 39.62² =
  40. 40.48² =

Answer key

  1. 1156
  2. 3969
  3. 4761
  4. 8464
  5. 3721
  6. 6241
  7. 1521
  8. 8649
  9. 4624
  10. 7225
  11. 9801
  12. 6889
  13. 9604
  14. 9025
  15. 3025
  16. 7396
  17. 7744
  18. 1369
  19. 2704
  20. 7569
  21. 1849
  22. 3481
  23. 2916
  24. 5476
  25. 8281
  26. 2209
  27. 1764
  28. 1681
  29. 4096
  30. 1296
  31. 6561
  32. 1024
  33. 3249
  34. 3364
  35. 1089
  36. 4489
  37. 1936
  38. 2601
  39. 3844
  40. 2304

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