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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 37 · 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. 1.31² =
  2. 2.48² =
  3. 3.63² =
  4. 4.46² =
  5. 5.38² =
  6. 6.44² =
  7. 7.39² =
  8. 8.42² =
  9. 9.69² =
  10. 10.75² =
  11. 11.57² =
  12. 12.65² =
  13. 13.77² =
  14. 14.89² =
  15. 15.45² =
  16. 16.58² =
  17. 17.54² =
  18. 18.51² =
  19. 19.68² =
  20. 20.33² =
  21. 21.64² =
  22. 22.56² =
  23. 23.67² =
  24. 24.97² =
  25. 25.52² =
  26. 26.92² =
  27. 27.61² =
  28. 28.85² =
  29. 29.41² =
  30. 30.99² =
  31. 31.94² =
  32. 32.95² =
  33. 33.36² =
  34. 34.82² =
  35. 35.66² =
  36. 36.91² =
  37. 37.37² =
  38. 38.47² =
  39. 39.62² =
  40. 40.74² =

Answer key

  1. 961
  2. 2304
  3. 3969
  4. 2116
  5. 1444
  6. 1936
  7. 1521
  8. 1764
  9. 4761
  10. 5625
  11. 3249
  12. 4225
  13. 5929
  14. 7921
  15. 2025
  16. 3364
  17. 2916
  18. 2601
  19. 4624
  20. 1089
  21. 4096
  22. 3136
  23. 4489
  24. 9409
  25. 2704
  26. 8464
  27. 3721
  28. 7225
  29. 1681
  30. 9801
  31. 8836
  32. 9025
  33. 1296
  34. 6724
  35. 4356
  36. 8281
  37. 1369
  38. 2209
  39. 3844
  40. 5476

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