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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 128 · 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. 1.75² =
  2. 2.87² =
  3. 3.35² =
  4. 4.68² =
  5. 5.83² =
  6. 6.37² =
  7. 7.65² =
  8. 8.82² =
  9. 9.93² =
  10. 10.71² =
  11. 11.94² =
  12. 12.33² =
  13. 13.43² =
  14. 14.46² =
  15. 15.57² =
  16. 16.74² =
  17. 17.76² =
  18. 18.34² =
  19. 19.85² =
  20. 20.89² =
  21. 21.48² =
  22. 22.62² =
  23. 23.64² =
  24. 24.39² =
  25. 25.31² =
  26. 26.56² =
  27. 27.63² =
  28. 28.91² =
  29. 29.98² =
  30. 30.73² =
  31. 31.66² =
  32. 32.58² =
  33. 33.42² =
  34. 34.38² =
  35. 35.61² =
  36. 36.88² =
  37. 37.32² =
  38. 38.86² =
  39. 39.78² =
  40. 40.96² =

Answer key

  1. 5625
  2. 7569
  3. 1225
  4. 4624
  5. 6889
  6. 1369
  7. 4225
  8. 6724
  9. 8649
  10. 5041
  11. 8836
  12. 1089
  13. 1849
  14. 2116
  15. 3249
  16. 5476
  17. 5776
  18. 1156
  19. 7225
  20. 7921
  21. 2304
  22. 3844
  23. 4096
  24. 1521
  25. 961
  26. 3136
  27. 3969
  28. 8281
  29. 9604
  30. 5329
  31. 4356
  32. 3364
  33. 1764
  34. 1444
  35. 3721
  36. 7744
  37. 1024
  38. 7396
  39. 6084
  40. 9216

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