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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 714 · 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. 1.37² =
  2. 2.44² =
  3. 3.75² =
  4. 4.65² =
  5. 5.53² =
  6. 6.38² =
  7. 7.48² =
  8. 8.47² =
  9. 9.51² =
  10. 10.39² =
  11. 11.95² =
  12. 12.69² =
  13. 13.57² =
  14. 14.45² =
  15. 15.77² =
  16. 16.91² =
  17. 17.97² =
  18. 18.84² =
  19. 19.79² =
  20. 20.64² =
  21. 21.66² =
  22. 22.87² =
  23. 23.49² =
  24. 24.71² =
  25. 25.58² =
  26. 26.78² =
  27. 27.89² =
  28. 28.59² =
  29. 29.94² =
  30. 30.62² =
  31. 31.86² =
  32. 32.42² =
  33. 33.35² =
  34. 34.56² =
  35. 35.81² =
  36. 36.46² =
  37. 37.85² =
  38. 38.32² =
  39. 39.83² =
  40. 40.51² =

Answer key

  1. 1369
  2. 1936
  3. 5625
  4. 4225
  5. 2809
  6. 1444
  7. 2304
  8. 2209
  9. 2601
  10. 1521
  11. 9025
  12. 4761
  13. 3249
  14. 2025
  15. 5929
  16. 8281
  17. 9409
  18. 7056
  19. 6241
  20. 4096
  21. 4356
  22. 7569
  23. 2401
  24. 5041
  25. 3364
  26. 6084
  27. 7921
  28. 3481
  29. 8836
  30. 3844
  31. 7396
  32. 1764
  33. 1225
  34. 3136
  35. 6561
  36. 2116
  37. 7225
  38. 1024
  39. 6889
  40. 2601

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