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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 955 · 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. 1.92² =
  2. 2.88² =
  3. 3.75² =
  4. 4.94² =
  5. 5.33² =
  6. 6.63² =
  7. 7.45² =
  8. 8.81² =
  9. 9.96² =
  10. 10.41² =
  11. 11.95² =
  12. 12.73² =
  13. 13.34² =
  14. 14.55² =
  15. 15.59² =
  16. 16.61² =
  17. 17.64² =
  18. 18.51² =
  19. 19.99² =
  20. 20.97² =
  21. 21.53² =
  22. 22.87² =
  23. 23.58² =
  24. 24.38² =
  25. 25.36² =
  26. 26.49² =
  27. 27.47² =
  28. 28.72² =
  29. 29.83² =
  30. 30.67² =
  31. 31.37² =
  32. 32.68² =
  33. 33.84² =
  34. 34.44² =
  35. 35.46² =
  36. 36.85² =
  37. 37.71² =
  38. 38.48² =
  39. 39.93² =
  40. 40.42² =

Answer key

  1. 8464
  2. 7744
  3. 5625
  4. 8836
  5. 1089
  6. 3969
  7. 2025
  8. 6561
  9. 9216
  10. 1681
  11. 9025
  12. 5329
  13. 1156
  14. 3025
  15. 3481
  16. 3721
  17. 4096
  18. 2601
  19. 9801
  20. 9409
  21. 2809
  22. 7569
  23. 3364
  24. 1444
  25. 1296
  26. 2401
  27. 2209
  28. 5184
  29. 6889
  30. 4489
  31. 1369
  32. 4624
  33. 7056
  34. 1936
  35. 2116
  36. 7225
  37. 5041
  38. 2304
  39. 8649
  40. 1764

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