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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 836 · 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. 1.98² =
  2. 2.51² =
  3. 3.79² =
  4. 4.91² =
  5. 5.41² =
  6. 6.83² =
  7. 7.36² =
  8. 8.62² =
  9. 9.38² =
  10. 10.67² =
  11. 11.55² =
  12. 12.39² =
  13. 13.87² =
  14. 14.82² =
  15. 15.46² =
  16. 16.44² =
  17. 17.43² =
  18. 18.72² =
  19. 19.53² =
  20. 20.59² =
  21. 21.47² =
  22. 22.37² =
  23. 23.57² =
  24. 24.94² =
  25. 25.32² =
  26. 26.45² =
  27. 27.65² =
  28. 28.63² =
  29. 29.81² =
  30. 30.56² =
  31. 31.31² =
  32. 32.99² =
  33. 33.71² =
  34. 34.61² =
  35. 35.97² =
  36. 36.88² =
  37. 37.73² =
  38. 38.66² =
  39. 39.35² =
  40. 40.58² =

Answer key

  1. 9604
  2. 2601
  3. 6241
  4. 8281
  5. 1681
  6. 6889
  7. 1296
  8. 3844
  9. 1444
  10. 4489
  11. 3025
  12. 1521
  13. 7569
  14. 6724
  15. 2116
  16. 1936
  17. 1849
  18. 5184
  19. 2809
  20. 3481
  21. 2209
  22. 1369
  23. 3249
  24. 8836
  25. 1024
  26. 2025
  27. 4225
  28. 3969
  29. 6561
  30. 3136
  31. 961
  32. 9801
  33. 5041
  34. 3721
  35. 9409
  36. 7744
  37. 5329
  38. 4356
  39. 1225
  40. 3364

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