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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 553 · 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. 2.73² =
  3. 3.97² =
  4. 4.72² =
  5. 5.39² =
  6. 6.32² =
  7. 7.48² =
  8. 8.47² =
  9. 9.94² =
  10. 10.51² =
  11. 11.45² =
  12. 12.81² =
  13. 13.58² =
  14. 14.77² =
  15. 15.31² =
  16. 16.61² =
  17. 17.67² =
  18. 18.37² =
  19. 19.68² =
  20. 20.49² =
  21. 21.84² =
  22. 22.33² =
  23. 23.91² =
  24. 24.46² =
  25. 25.52² =
  26. 26.76² =
  27. 27.95² =
  28. 28.82² =
  29. 29.36² =
  30. 30.92² =
  31. 31.93² =
  32. 32.74² =
  33. 33.35² =
  34. 34.57² =
  35. 35.44² =
  36. 36.43² =
  37. 37.34² =
  38. 38.65² =
  39. 39.59² =
  40. 40.64² =

Answer key

  1. 5625
  2. 5329
  3. 9409
  4. 5184
  5. 1521
  6. 1024
  7. 2304
  8. 2209
  9. 8836
  10. 2601
  11. 2025
  12. 6561
  13. 3364
  14. 5929
  15. 961
  16. 3721
  17. 4489
  18. 1369
  19. 4624
  20. 2401
  21. 7056
  22. 1089
  23. 8281
  24. 2116
  25. 2704
  26. 5776
  27. 9025
  28. 6724
  29. 1296
  30. 8464
  31. 8649
  32. 5476
  33. 1225
  34. 3249
  35. 1936
  36. 1849
  37. 1156
  38. 4225
  39. 3481
  40. 4096

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