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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 367 · 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. 1.39² =
  2. 2.42² =
  3. 3.91² =
  4. 4.41² =
  5. 5.81² =
  6. 6.79² =
  7. 7.44² =
  8. 8.83² =
  9. 9.35² =
  10. 10.67² =
  11. 11.95² =
  12. 12.53² =
  13. 13.87² =
  14. 14.75² =
  15. 15.99² =
  16. 16.97² =
  17. 17.72² =
  18. 18.93² =
  19. 19.34² =
  20. 20.88² =
  21. 21.54² =
  22. 22.48² =
  23. 23.71² =
  24. 24.62² =
  25. 25.78² =
  26. 26.94² =
  27. 27.84² =
  28. 28.92² =
  29. 29.58² =
  30. 30.49² =
  31. 31.47² =
  32. 32.32² =
  33. 33.85² =
  34. 34.51² =
  35. 35.45² =
  36. 36.96² =
  37. 37.32² =
  38. 38.86² =
  39. 39.61² =
  40. 40.65² =

Answer key

  1. 1521
  2. 1764
  3. 8281
  4. 1681
  5. 6561
  6. 6241
  7. 1936
  8. 6889
  9. 1225
  10. 4489
  11. 9025
  12. 2809
  13. 7569
  14. 5625
  15. 9801
  16. 9409
  17. 5184
  18. 8649
  19. 1156
  20. 7744
  21. 2916
  22. 2304
  23. 5041
  24. 3844
  25. 6084
  26. 8836
  27. 7056
  28. 8464
  29. 3364
  30. 2401
  31. 2209
  32. 1024
  33. 7225
  34. 2601
  35. 2025
  36. 9216
  37. 1024
  38. 7396
  39. 3721
  40. 4225

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