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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 756 · 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. 1.78² =
  2. 2.77² =
  3. 3.35² =
  4. 4.61² =
  5. 5.91² =
  6. 6.36² =
  7. 7.93² =
  8. 8.84² =
  9. 9.71² =
  10. 10.51² =
  11. 11.58² =
  12. 12.97² =
  13. 13.74² =
  14. 14.48² =
  15. 15.38² =
  16. 16.87² =
  17. 17.92² =
  18. 18.65² =
  19. 19.32² =
  20. 20.49² =
  21. 21.96² =
  22. 22.94² =
  23. 23.69² =
  24. 24.56² =
  25. 25.83² =
  26. 26.31² =
  27. 27.59² =
  28. 28.39² =
  29. 29.75² =
  30. 30.85² =
  31. 31.44² =
  32. 32.89² =
  33. 33.33² =
  34. 34.41² =
  35. 35.76² =
  36. 36.81² =
  37. 37.46² =
  38. 38.79² =
  39. 39.47² =
  40. 40.72² =

Answer key

  1. 6084
  2. 5929
  3. 1225
  4. 3721
  5. 8281
  6. 1296
  7. 8649
  8. 7056
  9. 5041
  10. 2601
  11. 3364
  12. 9409
  13. 5476
  14. 2304
  15. 1444
  16. 7569
  17. 8464
  18. 4225
  19. 1024
  20. 2401
  21. 9216
  22. 8836
  23. 4761
  24. 3136
  25. 6889
  26. 961
  27. 3481
  28. 1521
  29. 5625
  30. 7225
  31. 1936
  32. 7921
  33. 1089
  34. 1681
  35. 5776
  36. 6561
  37. 2116
  38. 6241
  39. 2209
  40. 5184

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