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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 498 · 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. 1.99² =
  2. 2.85² =
  3. 3.94² =
  4. 4.44² =
  5. 5.46² =
  6. 6.58² =
  7. 7.32² =
  8. 8.82² =
  9. 9.78² =
  10. 10.38² =
  11. 11.49² =
  12. 12.43² =
  13. 13.92² =
  14. 14.41² =
  15. 15.51² =
  16. 16.65² =
  17. 17.71² =
  18. 18.91² =
  19. 19.79² =
  20. 20.97² =
  21. 21.36² =
  22. 22.73² =
  23. 23.48² =
  24. 24.87² =
  25. 25.33² =
  26. 26.96² =
  27. 27.77² =
  28. 28.83² =
  29. 29.86² =
  30. 30.75² =
  31. 31.95² =
  32. 32.66² =
  33. 33.34² =
  34. 34.69² =
  35. 35.45² =
  36. 36.55² =
  37. 37.35² =
  38. 38.93² =
  39. 39.59² =
  40. 40.61² =

Answer key

  1. 9801
  2. 7225
  3. 8836
  4. 1936
  5. 2116
  6. 3364
  7. 1024
  8. 6724
  9. 6084
  10. 1444
  11. 2401
  12. 1849
  13. 8464
  14. 1681
  15. 2601
  16. 4225
  17. 5041
  18. 8281
  19. 6241
  20. 9409
  21. 1296
  22. 5329
  23. 2304
  24. 7569
  25. 1089
  26. 9216
  27. 5929
  28. 6889
  29. 7396
  30. 5625
  31. 9025
  32. 4356
  33. 1156
  34. 4761
  35. 2025
  36. 3025
  37. 1225
  38. 8649
  39. 3481
  40. 3721

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