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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 992 · 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. 2.91² =
  3. 3.51² =
  4. 4.61² =
  5. 5.36² =
  6. 6.99² =
  7. 7.94² =
  8. 8.75² =
  9. 9.89² =
  10. 10.83² =
  11. 11.31² =
  12. 12.71² =
  13. 13.52² =
  14. 14.82² =
  15. 15.44² =
  16. 16.57² =
  17. 17.72² =
  18. 18.95² =
  19. 19.63² =
  20. 20.41² =
  21. 21.46² =
  22. 22.49² =
  23. 23.76² =
  24. 24.69² =
  25. 25.97² =
  26. 26.92² =
  27. 27.68² =
  28. 28.48² =
  29. 29.43² =
  30. 30.37² =
  31. 31.59² =
  32. 32.77² =
  33. 33.47² =
  34. 34.35² =
  35. 35.39² =
  36. 36.81² =
  37. 37.54² =
  38. 38.87² =
  39. 39.66² =
  40. 40.85² =

Answer key

  1. 9604
  2. 8281
  3. 2601
  4. 3721
  5. 1296
  6. 9801
  7. 8836
  8. 5625
  9. 7921
  10. 6889
  11. 961
  12. 5041
  13. 2704
  14. 6724
  15. 1936
  16. 3249
  17. 5184
  18. 9025
  19. 3969
  20. 1681
  21. 2116
  22. 2401
  23. 5776
  24. 4761
  25. 9409
  26. 8464
  27. 4624
  28. 2304
  29. 1849
  30. 1369
  31. 3481
  32. 5929
  33. 2209
  34. 1225
  35. 1521
  36. 6561
  37. 2916
  38. 7569
  39. 4356
  40. 7225

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