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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 612 · 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. 1.49² =
  2. 2.37² =
  3. 3.58² =
  4. 4.85² =
  5. 5.72² =
  6. 6.88² =
  7. 7.45² =
  8. 8.99² =
  9. 9.95² =
  10. 10.34² =
  11. 11.64² =
  12. 12.73² =
  13. 13.71² =
  14. 14.74² =
  15. 15.51² =
  16. 16.61² =
  17. 17.53² =
  18. 18.32² =
  19. 19.81² =
  20. 20.54² =
  21. 21.83² =
  22. 22.89² =
  23. 23.87² =
  24. 24.57² =
  25. 25.43² =
  26. 26.96² =
  27. 27.48² =
  28. 28.31² =
  29. 29.75² =
  30. 30.91² =
  31. 31.39² =
  32. 32.46² =
  33. 33.36² =
  34. 34.67² =
  35. 35.35² =
  36. 36.63² =
  37. 37.44² =
  38. 38.38² =
  39. 39.93² =
  40. 40.59² =

Answer key

  1. 2401
  2. 1369
  3. 3364
  4. 7225
  5. 5184
  6. 7744
  7. 2025
  8. 9801
  9. 9025
  10. 1156
  11. 4096
  12. 5329
  13. 5041
  14. 5476
  15. 2601
  16. 3721
  17. 2809
  18. 1024
  19. 6561
  20. 2916
  21. 6889
  22. 7921
  23. 7569
  24. 3249
  25. 1849
  26. 9216
  27. 2304
  28. 961
  29. 5625
  30. 8281
  31. 1521
  32. 2116
  33. 1296
  34. 4489
  35. 1225
  36. 3969
  37. 1936
  38. 1444
  39. 8649
  40. 3481

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