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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 902 · 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. 1.69² =
  2. 2.31² =
  3. 3.49² =
  4. 4.45² =
  5. 5.93² =
  6. 6.41² =
  7. 7.52² =
  8. 8.66² =
  9. 9.87² =
  10. 10.91² =
  11. 11.79² =
  12. 12.48² =
  13. 13.95² =
  14. 14.35² =
  15. 15.71² =
  16. 16.51² =
  17. 17.98² =
  18. 18.54² =
  19. 19.57² =
  20. 20.89² =
  21. 21.97² =
  22. 22.36² =
  23. 23.73² =
  24. 24.99² =
  25. 25.61² =
  26. 26.76² =
  27. 27.75² =
  28. 28.37² =
  29. 29.32² =
  30. 30.53² =
  31. 31.64² =
  32. 32.68² =
  33. 33.46² =
  34. 34.58² =
  35. 35.78² =
  36. 36.83² =
  37. 37.44² =
  38. 38.88² =
  39. 39.42² =
  40. 40.81² =

Answer key

  1. 4761
  2. 961
  3. 2401
  4. 2025
  5. 8649
  6. 1681
  7. 2704
  8. 4356
  9. 7569
  10. 8281
  11. 6241
  12. 2304
  13. 9025
  14. 1225
  15. 5041
  16. 2601
  17. 9604
  18. 2916
  19. 3249
  20. 7921
  21. 9409
  22. 1296
  23. 5329
  24. 9801
  25. 3721
  26. 5776
  27. 5625
  28. 1369
  29. 1024
  30. 2809
  31. 4096
  32. 4624
  33. 2116
  34. 3364
  35. 6084
  36. 6889
  37. 1936
  38. 7744
  39. 1764
  40. 6561

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