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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 545 · 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. 3.38² =
  4. 4.77² =
  5. 5.73² =
  6. 6.37² =
  7. 7.52² =
  8. 8.53² =
  9. 9.51² =
  10. 10.75² =
  11. 11.97² =
  12. 12.43² =
  13. 13.42² =
  14. 14.61² =
  15. 15.41² =
  16. 16.95² =
  17. 17.33² =
  18. 18.64² =
  19. 19.59² =
  20. 20.62² =
  21. 21.39² =
  22. 22.93² =
  23. 23.63² =
  24. 24.54² =
  25. 25.48² =
  26. 26.87² =
  27. 27.32² =
  28. 28.78² =
  29. 29.55² =
  30. 30.44² =
  31. 31.71² =
  32. 32.84² =
  33. 33.31² =
  34. 34.81² =
  35. 35.91² =
  36. 36.35² =
  37. 37.67² =
  38. 38.69² =
  39. 39.96² =
  40. 40.36² =

Answer key

  1. 8464
  2. 3364
  3. 1444
  4. 5929
  5. 5329
  6. 1369
  7. 2704
  8. 2809
  9. 2601
  10. 5625
  11. 9409
  12. 1849
  13. 1764
  14. 3721
  15. 1681
  16. 9025
  17. 1089
  18. 4096
  19. 3481
  20. 3844
  21. 1521
  22. 8649
  23. 3969
  24. 2916
  25. 2304
  26. 7569
  27. 1024
  28. 6084
  29. 3025
  30. 1936
  31. 5041
  32. 7056
  33. 961
  34. 6561
  35. 8281
  36. 1225
  37. 4489
  38. 4761
  39. 9216
  40. 1296

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