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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 265 · 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. 1.63² =
  2. 2.89² =
  3. 3.87² =
  4. 4.34² =
  5. 5.75² =
  6. 6.73² =
  7. 7.71² =
  8. 8.43² =
  9. 9.42² =
  10. 10.88² =
  11. 11.79² =
  12. 12.59² =
  13. 13.37² =
  14. 14.61² =
  15. 15.48² =
  16. 16.72² =
  17. 17.54² =
  18. 18.35² =
  19. 19.31² =
  20. 20.99² =
  21. 21.84² =
  22. 22.36² =
  23. 23.66² =
  24. 24.52² =
  25. 25.38² =
  26. 26.39² =
  27. 27.85² =
  28. 28.64² =
  29. 29.69² =
  30. 30.91² =
  31. 31.51² =
  32. 32.45² =
  33. 33.65² =
  34. 34.77² =
  35. 35.81² =
  36. 36.83² =
  37. 37.76² =
  38. 38.92² =
  39. 39.96² =
  40. 40.47² =

Answer key

  1. 3969
  2. 7921
  3. 7569
  4. 1156
  5. 5625
  6. 5329
  7. 5041
  8. 1849
  9. 1764
  10. 7744
  11. 6241
  12. 3481
  13. 1369
  14. 3721
  15. 2304
  16. 5184
  17. 2916
  18. 1225
  19. 961
  20. 9801
  21. 7056
  22. 1296
  23. 4356
  24. 2704
  25. 1444
  26. 1521
  27. 7225
  28. 4096
  29. 4761
  30. 8281
  31. 2601
  32. 2025
  33. 4225
  34. 5929
  35. 6561
  36. 6889
  37. 5776
  38. 8464
  39. 9216
  40. 2209

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