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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 601 · 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. 1.84² =
  2. 2.39² =
  3. 3.74² =
  4. 4.36² =
  5. 5.76² =
  6. 6.59² =
  7. 7.31² =
  8. 8.58² =
  9. 9.89² =
  10. 10.54² =
  11. 11.41² =
  12. 12.61² =
  13. 13.69² =
  14. 14.75² =
  15. 15.51² =
  16. 16.32² =
  17. 17.79² =
  18. 18.91² =
  19. 19.47² =
  20. 20.97² =
  21. 21.96² =
  22. 22.67² =
  23. 23.87² =
  24. 24.38² =
  25. 25.77² =
  26. 26.72² =
  27. 27.71² =
  28. 28.42² =
  29. 29.81² =
  30. 30.68² =
  31. 31.88² =
  32. 32.94² =
  33. 33.64² =
  34. 34.83² =
  35. 35.43² =
  36. 36.85² =
  37. 37.55² =
  38. 38.99² =
  39. 39.78² =
  40. 40.56² =

Answer key

  1. 7056
  2. 1521
  3. 5476
  4. 1296
  5. 5776
  6. 3481
  7. 961
  8. 3364
  9. 7921
  10. 2916
  11. 1681
  12. 3721
  13. 4761
  14. 5625
  15. 2601
  16. 1024
  17. 6241
  18. 8281
  19. 2209
  20. 9409
  21. 9216
  22. 4489
  23. 7569
  24. 1444
  25. 5929
  26. 5184
  27. 5041
  28. 1764
  29. 6561
  30. 4624
  31. 7744
  32. 8836
  33. 4096
  34. 6889
  35. 1849
  36. 7225
  37. 3025
  38. 9801
  39. 6084
  40. 3136

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