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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 456 · 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. 1.62² =
  2. 2.43² =
  3. 3.75² =
  4. 4.35² =
  5. 5.47² =
  6. 6.59² =
  7. 7.85² =
  8. 8.44² =
  9. 9.41² =
  10. 10.45² =
  11. 11.92² =
  12. 12.91² =
  13. 13.96² =
  14. 14.88² =
  15. 15.78² =
  16. 16.73² =
  17. 17.39² =
  18. 18.71² =
  19. 19.52² =
  20. 20.61² =
  21. 21.72² =
  22. 22.37² =
  23. 23.86² =
  24. 24.33² =
  25. 25.79² =
  26. 26.94² =
  27. 27.54² =
  28. 28.65² =
  29. 29.74² =
  30. 30.46² =
  31. 31.66² =
  32. 32.81² =
  33. 33.36² =
  34. 34.63² =
  35. 35.57² =
  36. 36.51² =
  37. 37.68² =
  38. 38.77² =
  39. 39.93² =
  40. 40.49² =

Answer key

  1. 3844
  2. 1849
  3. 5625
  4. 1225
  5. 2209
  6. 3481
  7. 7225
  8. 1936
  9. 1681
  10. 2025
  11. 8464
  12. 8281
  13. 9216
  14. 7744
  15. 6084
  16. 5329
  17. 1521
  18. 5041
  19. 2704
  20. 3721
  21. 5184
  22. 1369
  23. 7396
  24. 1089
  25. 6241
  26. 8836
  27. 2916
  28. 4225
  29. 5476
  30. 2116
  31. 4356
  32. 6561
  33. 1296
  34. 3969
  35. 3249
  36. 2601
  37. 4624
  38. 5929
  39. 8649
  40. 2401

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