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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 610 · 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. 1.51² =
  2. 2.95² =
  3. 3.61² =
  4. 4.73² =
  5. 5.52² =
  6. 6.32² =
  7. 7.36² =
  8. 8.55² =
  9. 9.57² =
  10. 10.75² =
  11. 11.35² =
  12. 12.46² =
  13. 13.53² =
  14. 14.58² =
  15. 15.77² =
  16. 16.66² =
  17. 17.71² =
  18. 18.82² =
  19. 19.42² =
  20. 20.86² =
  21. 21.74² =
  22. 22.48² =
  23. 23.97² =
  24. 24.83² =
  25. 25.62² =
  26. 26.34² =
  27. 27.79² =
  28. 28.85² =
  29. 29.96² =
  30. 30.91² =
  31. 31.49² =
  32. 32.67² =
  33. 33.33² =
  34. 34.76² =
  35. 35.38² =
  36. 36.65² =
  37. 37.44² =
  38. 38.37² =
  39. 39.94² =
  40. 40.98² =

Answer key

  1. 2601
  2. 9025
  3. 3721
  4. 5329
  5. 2704
  6. 1024
  7. 1296
  8. 3025
  9. 3249
  10. 5625
  11. 1225
  12. 2116
  13. 2809
  14. 3364
  15. 5929
  16. 4356
  17. 5041
  18. 6724
  19. 1764
  20. 7396
  21. 5476
  22. 2304
  23. 9409
  24. 6889
  25. 3844
  26. 1156
  27. 6241
  28. 7225
  29. 9216
  30. 8281
  31. 2401
  32. 4489
  33. 1089
  34. 5776
  35. 1444
  36. 4225
  37. 1936
  38. 1369
  39. 8836
  40. 9604

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