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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 952 · 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. 1.46² =
  2. 2.61² =
  3. 3.41² =
  4. 4.45² =
  5. 5.43² =
  6. 6.59² =
  7. 7.64² =
  8. 8.53² =
  9. 9.38² =
  10. 10.48² =
  11. 11.54² =
  12. 12.96² =
  13. 13.35² =
  14. 14.51² =
  15. 15.39² =
  16. 16.91² =
  17. 17.99² =
  18. 18.69² =
  19. 19.57² =
  20. 20.37² =
  21. 21.68² =
  22. 22.93² =
  23. 23.67² =
  24. 24.87² =
  25. 25.47² =
  26. 26.84² =
  27. 27.81² =
  28. 28.74² =
  29. 29.58² =
  30. 30.72² =
  31. 31.56² =
  32. 32.98² =
  33. 33.33² =
  34. 34.79² =
  35. 35.31² =
  36. 36.83² =
  37. 37.66² =
  38. 38.36² =
  39. 39.76² =
  40. 40.86² =

Answer key

  1. 2116
  2. 3721
  3. 1681
  4. 2025
  5. 1849
  6. 3481
  7. 4096
  8. 2809
  9. 1444
  10. 2304
  11. 2916
  12. 9216
  13. 1225
  14. 2601
  15. 1521
  16. 8281
  17. 9801
  18. 4761
  19. 3249
  20. 1369
  21. 4624
  22. 8649
  23. 4489
  24. 7569
  25. 2209
  26. 7056
  27. 6561
  28. 5476
  29. 3364
  30. 5184
  31. 3136
  32. 9604
  33. 1089
  34. 6241
  35. 961
  36. 6889
  37. 4356
  38. 1296
  39. 5776
  40. 7396

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