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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 893 · 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. 1.88² =
  2. 2.76² =
  3. 3.97² =
  4. 4.93² =
  5. 5.71² =
  6. 6.61² =
  7. 7.81² =
  8. 8.51² =
  9. 9.65² =
  10. 10.64² =
  11. 11.58² =
  12. 12.35² =
  13. 13.42² =
  14. 14.89² =
  15. 15.86² =
  16. 16.92² =
  17. 17.34² =
  18. 18.48² =
  19. 19.96² =
  20. 20.36² =
  21. 21.33² =
  22. 22.95² =
  23. 23.55² =
  24. 24.99² =
  25. 25.47² =
  26. 26.41² =
  27. 27.75² =
  28. 28.54² =
  29. 29.39² =
  30. 30.32² =
  31. 31.62² =
  32. 32.31² =
  33. 33.72² =
  34. 34.67² =
  35. 35.43² =
  36. 36.56² =
  37. 37.78² =
  38. 38.46² =
  39. 39.74² =
  40. 40.44² =

Answer key

  1. 7744
  2. 5776
  3. 9409
  4. 8649
  5. 5041
  6. 3721
  7. 6561
  8. 2601
  9. 4225
  10. 4096
  11. 3364
  12. 1225
  13. 1764
  14. 7921
  15. 7396
  16. 8464
  17. 1156
  18. 2304
  19. 9216
  20. 1296
  21. 1089
  22. 9025
  23. 3025
  24. 9801
  25. 2209
  26. 1681
  27. 5625
  28. 2916
  29. 1521
  30. 1024
  31. 3844
  32. 961
  33. 5184
  34. 4489
  35. 1849
  36. 3136
  37. 6084
  38. 2116
  39. 5476
  40. 1936

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