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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 940 · 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. 1.91² =
  2. 2.64² =
  3. 3.66² =
  4. 4.89² =
  5. 5.99² =
  6. 6.65² =
  7. 7.41² =
  8. 8.71² =
  9. 9.46² =
  10. 10.72² =
  11. 11.61² =
  12. 12.81² =
  13. 13.56² =
  14. 14.76² =
  15. 15.35² =
  16. 16.62² =
  17. 17.87² =
  18. 18.34² =
  19. 19.38² =
  20. 20.37² =
  21. 21.78² =
  22. 22.92² =
  23. 23.43² =
  24. 24.39² =
  25. 25.97² =
  26. 26.31² =
  27. 27.48² =
  28. 28.42² =
  29. 29.44² =
  30. 30.79² =
  31. 31.55² =
  32. 32.82² =
  33. 33.83² =
  34. 34.51² =
  35. 35.45² =
  36. 36.98² =
  37. 37.63² =
  38. 38.94² =
  39. 39.95² =
  40. 40.77² =

Answer key

  1. 8281
  2. 4096
  3. 4356
  4. 7921
  5. 9801
  6. 4225
  7. 1681
  8. 5041
  9. 2116
  10. 5184
  11. 3721
  12. 6561
  13. 3136
  14. 5776
  15. 1225
  16. 3844
  17. 7569
  18. 1156
  19. 1444
  20. 1369
  21. 6084
  22. 8464
  23. 1849
  24. 1521
  25. 9409
  26. 961
  27. 2304
  28. 1764
  29. 1936
  30. 6241
  31. 3025
  32. 6724
  33. 6889
  34. 2601
  35. 2025
  36. 9604
  37. 3969
  38. 8836
  39. 9025
  40. 5929

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