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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 941 · 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. 1.61² =
  2. 2.31² =
  3. 3.52² =
  4. 4.55² =
  5. 5.66² =
  6. 6.37² =
  7. 7.91² =
  8. 8.81² =
  9. 9.72² =
  10. 10.32² =
  11. 11.94² =
  12. 12.34² =
  13. 13.71² =
  14. 14.67² =
  15. 15.43² =
  16. 16.54² =
  17. 17.68² =
  18. 18.47² =
  19. 19.51² =
  20. 20.45² =
  21. 21.56² =
  22. 22.38² =
  23. 23.73² =
  24. 24.33² =
  25. 25.59² =
  26. 26.83² =
  27. 27.42² =
  28. 28.92² =
  29. 29.36² =
  30. 30.69² =
  31. 31.88² =
  32. 32.84² =
  33. 33.93² =
  34. 34.97² =
  35. 35.46² =
  36. 36.49² =
  37. 37.96² =
  38. 38.78² =
  39. 39.65² =
  40. 40.86² =

Answer key

  1. 3721
  2. 961
  3. 2704
  4. 3025
  5. 4356
  6. 1369
  7. 8281
  8. 6561
  9. 5184
  10. 1024
  11. 8836
  12. 1156
  13. 5041
  14. 4489
  15. 1849
  16. 2916
  17. 4624
  18. 2209
  19. 2601
  20. 2025
  21. 3136
  22. 1444
  23. 5329
  24. 1089
  25. 3481
  26. 6889
  27. 1764
  28. 8464
  29. 1296
  30. 4761
  31. 7744
  32. 7056
  33. 8649
  34. 9409
  35. 2116
  36. 2401
  37. 9216
  38. 6084
  39. 4225
  40. 7396

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