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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 305 · 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. 1.79² =
  2. 2.66² =
  3. 3.62² =
  4. 4.96² =
  5. 5.76² =
  6. 6.59² =
  7. 7.98² =
  8. 8.56² =
  9. 9.65² =
  10. 10.73² =
  11. 11.53² =
  12. 12.51² =
  13. 13.84² =
  14. 14.77² =
  15. 15.71² =
  16. 16.88² =
  17. 17.42² =
  18. 18.55² =
  19. 19.87² =
  20. 20.93² =
  21. 21.68² =
  22. 22.63² =
  23. 23.91² =
  24. 24.48² =
  25. 25.89² =
  26. 26.54² =
  27. 27.41² =
  28. 28.99² =
  29. 29.69² =
  30. 30.32² =
  31. 31.61² =
  32. 32.85² =
  33. 33.52² =
  34. 34.78² =
  35. 35.31² =
  36. 36.39² =
  37. 37.37² =
  38. 38.46² =
  39. 39.97² =
  40. 40.46² =

Answer key

  1. 6241
  2. 4356
  3. 3844
  4. 9216
  5. 5776
  6. 3481
  7. 9604
  8. 3136
  9. 4225
  10. 5329
  11. 2809
  12. 2601
  13. 7056
  14. 5929
  15. 5041
  16. 7744
  17. 1764
  18. 3025
  19. 7569
  20. 8649
  21. 4624
  22. 3969
  23. 8281
  24. 2304
  25. 7921
  26. 2916
  27. 1681
  28. 9801
  29. 4761
  30. 1024
  31. 3721
  32. 7225
  33. 2704
  34. 6084
  35. 961
  36. 1521
  37. 1369
  38. 2116
  39. 9409
  40. 2116

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