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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 521 · 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. 1.97² =
  2. 2.91² =
  3. 3.64² =
  4. 4.72² =
  5. 5.89² =
  6. 6.92² =
  7. 7.95² =
  8. 8.38² =
  9. 9.32² =
  10. 10.45² =
  11. 11.37² =
  12. 12.51² =
  13. 13.47² =
  14. 14.34² =
  15. 15.87² =
  16. 16.63² =
  17. 17.83² =
  18. 18.77² =
  19. 19.46² =
  20. 20.75² =
  21. 21.43² =
  22. 22.53² =
  23. 23.49² =
  24. 24.81² =
  25. 25.69² =
  26. 26.33² =
  27. 27.36² =
  28. 28.42² =
  29. 29.56² =
  30. 30.94² =
  31. 31.98² =
  32. 32.78² =
  33. 33.59² =
  34. 34.62² =
  35. 35.66² =
  36. 36.44² =
  37. 37.84² =
  38. 38.76² =
  39. 39.39² =
  40. 40.79² =

Answer key

  1. 9409
  2. 8281
  3. 4096
  4. 5184
  5. 7921
  6. 8464
  7. 9025
  8. 1444
  9. 1024
  10. 2025
  11. 1369
  12. 2601
  13. 2209
  14. 1156
  15. 7569
  16. 3969
  17. 6889
  18. 5929
  19. 2116
  20. 5625
  21. 1849
  22. 2809
  23. 2401
  24. 6561
  25. 4761
  26. 1089
  27. 1296
  28. 1764
  29. 3136
  30. 8836
  31. 9604
  32. 6084
  33. 3481
  34. 3844
  35. 4356
  36. 1936
  37. 7056
  38. 5776
  39. 1521
  40. 6241

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