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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 687 · 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. 1.93² =
  2. 2.69² =
  3. 3.44² =
  4. 4.87² =
  5. 5.41² =
  6. 6.96² =
  7. 7.83² =
  8. 8.65² =
  9. 9.62² =
  10. 10.77² =
  11. 11.95² =
  12. 12.56² =
  13. 13.97² =
  14. 14.59² =
  15. 15.81² =
  16. 16.38² =
  17. 17.92² =
  18. 18.58² =
  19. 19.51² =
  20. 20.71² =
  21. 21.78² =
  22. 22.73² =
  23. 23.61² =
  24. 24.94² =
  25. 25.85² =
  26. 26.46² =
  27. 27.35² =
  28. 28.37² =
  29. 29.74² =
  30. 30.99² =
  31. 31.45² =
  32. 32.91² =
  33. 33.67² =
  34. 34.49² =
  35. 35.48² =
  36. 36.68² =
  37. 37.88² =
  38. 38.47² =
  39. 39.79² =
  40. 40.75² =

Answer key

  1. 8649
  2. 4761
  3. 1936
  4. 7569
  5. 1681
  6. 9216
  7. 6889
  8. 4225
  9. 3844
  10. 5929
  11. 9025
  12. 3136
  13. 9409
  14. 3481
  15. 6561
  16. 1444
  17. 8464
  18. 3364
  19. 2601
  20. 5041
  21. 6084
  22. 5329
  23. 3721
  24. 8836
  25. 7225
  26. 2116
  27. 1225
  28. 1369
  29. 5476
  30. 9801
  31. 2025
  32. 8281
  33. 4489
  34. 2401
  35. 2304
  36. 4624
  37. 7744
  38. 2209
  39. 6241
  40. 5625

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