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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 827 · 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. 2.42² =
  3. 3.64² =
  4. 4.95² =
  5. 5.68² =
  6. 6.63² =
  7. 7.96² =
  8. 8.32² =
  9. 9.34² =
  10. 10.75² =
  11. 11.48² =
  12. 12.86² =
  13. 13.36² =
  14. 14.33² =
  15. 15.47² =
  16. 16.58² =
  17. 17.97² =
  18. 18.88² =
  19. 19.81² =
  20. 20.39² =
  21. 21.87² =
  22. 22.82² =
  23. 23.35² =
  24. 24.53² =
  25. 25.73² =
  26. 26.67² =
  27. 27.71² =
  28. 28.56² =
  29. 29.41² =
  30. 30.55² =
  31. 31.99² =
  32. 32.54² =
  33. 33.91² =
  34. 34.65² =
  35. 35.61² =
  36. 36.76² =
  37. 37.38² =
  38. 38.31² =
  39. 39.74² =
  40. 40.52² =

Answer key

  1. 2116
  2. 1764
  3. 4096
  4. 9025
  5. 4624
  6. 3969
  7. 9216
  8. 1024
  9. 1156
  10. 5625
  11. 2304
  12. 7396
  13. 1296
  14. 1089
  15. 2209
  16. 3364
  17. 9409
  18. 7744
  19. 6561
  20. 1521
  21. 7569
  22. 6724
  23. 1225
  24. 2809
  25. 5329
  26. 4489
  27. 5041
  28. 3136
  29. 1681
  30. 3025
  31. 9801
  32. 2916
  33. 8281
  34. 4225
  35. 3721
  36. 5776
  37. 1444
  38. 961
  39. 5476
  40. 2704

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