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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 262 · 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. 2.65² =
  3. 3.83² =
  4. 4.81² =
  5. 5.91² =
  6. 6.86² =
  7. 7.59² =
  8. 8.41² =
  9. 9.73² =
  10. 10.61² =
  11. 11.56² =
  12. 12.44² =
  13. 13.95² =
  14. 14.46² =
  15. 15.66² =
  16. 16.43² =
  17. 17.55² =
  18. 18.71² =
  19. 19.93² =
  20. 20.37² =
  21. 21.39² =
  22. 22.82² =
  23. 23.32² =
  24. 24.45² =
  25. 25.31² =
  26. 26.64² =
  27. 27.52² =
  28. 28.42² =
  29. 29.74² =
  30. 30.78² =
  31. 31.33² =
  32. 32.96² =
  33. 33.98² =
  34. 34.34² =
  35. 35.47² =
  36. 36.87² =
  37. 37.79² =
  38. 38.88² =
  39. 39.97² =
  40. 40.84² =

Answer key

  1. 5625
  2. 4225
  3. 6889
  4. 6561
  5. 8281
  6. 7396
  7. 3481
  8. 1681
  9. 5329
  10. 3721
  11. 3136
  12. 1936
  13. 9025
  14. 2116
  15. 4356
  16. 1849
  17. 3025
  18. 5041
  19. 8649
  20. 1369
  21. 1521
  22. 6724
  23. 1024
  24. 2025
  25. 961
  26. 4096
  27. 2704
  28. 1764
  29. 5476
  30. 6084
  31. 1089
  32. 9216
  33. 9604
  34. 1156
  35. 2209
  36. 7569
  37. 6241
  38. 7744
  39. 9409
  40. 7056

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