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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 982 · 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. 1.42² =
  2. 2.98² =
  3. 3.51² =
  4. 4.44² =
  5. 5.48² =
  6. 6.58² =
  7. 7.74² =
  8. 8.97² =
  9. 9.59² =
  10. 10.85² =
  11. 11.62² =
  12. 12.76² =
  13. 13.78² =
  14. 14.95² =
  15. 15.43² =
  16. 16.52² =
  17. 17.99² =
  18. 18.35² =
  19. 19.34² =
  20. 20.47² =
  21. 21.71² =
  22. 22.37² =
  23. 23.31² =
  24. 24.88² =
  25. 25.53² =
  26. 26.81² =
  27. 27.57² =
  28. 28.91² =
  29. 29.45² =
  30. 30.94² =
  31. 31.87² =
  32. 32.46² =
  33. 33.41² =
  34. 34.36² =
  35. 35.93² =
  36. 36.56² =
  37. 37.67² =
  38. 38.77² =
  39. 39.73² =
  40. 40.39² =

Answer key

  1. 1764
  2. 9604
  3. 2601
  4. 1936
  5. 2304
  6. 3364
  7. 5476
  8. 9409
  9. 3481
  10. 7225
  11. 3844
  12. 5776
  13. 6084
  14. 9025
  15. 1849
  16. 2704
  17. 9801
  18. 1225
  19. 1156
  20. 2209
  21. 5041
  22. 1369
  23. 961
  24. 7744
  25. 2809
  26. 6561
  27. 3249
  28. 8281
  29. 2025
  30. 8836
  31. 7569
  32. 2116
  33. 1681
  34. 1296
  35. 8649
  36. 3136
  37. 4489
  38. 5929
  39. 5329
  40. 1521

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