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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 906 · 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. 1.71² =
  2. 2.87² =
  3. 3.79² =
  4. 4.75² =
  5. 5.38² =
  6. 6.43² =
  7. 7.93² =
  8. 8.34² =
  9. 9.84² =
  10. 10.66² =
  11. 11.72² =
  12. 12.35² =
  13. 13.51² =
  14. 14.99² =
  15. 15.97² =
  16. 16.41² =
  17. 17.39² =
  18. 18.64² =
  19. 19.58² =
  20. 20.61² =
  21. 21.31² =
  22. 22.44² =
  23. 23.95² =
  24. 24.73² =
  25. 25.54² =
  26. 26.81² =
  27. 27.82² =
  28. 28.42² =
  29. 29.37² =
  30. 30.88² =
  31. 31.49² =
  32. 32.48² =
  33. 33.67² =
  34. 34.59² =
  35. 35.69² =
  36. 36.52² =
  37. 37.47² =
  38. 38.91² =
  39. 39.56² =
  40. 40.92² =

Answer key

  1. 5041
  2. 7569
  3. 6241
  4. 5625
  5. 1444
  6. 1849
  7. 8649
  8. 1156
  9. 7056
  10. 4356
  11. 5184
  12. 1225
  13. 2601
  14. 9801
  15. 9409
  16. 1681
  17. 1521
  18. 4096
  19. 3364
  20. 3721
  21. 961
  22. 1936
  23. 9025
  24. 5329
  25. 2916
  26. 6561
  27. 6724
  28. 1764
  29. 1369
  30. 7744
  31. 2401
  32. 2304
  33. 4489
  34. 3481
  35. 4761
  36. 2704
  37. 2209
  38. 8281
  39. 3136
  40. 8464

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