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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 364 · 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. 1.32² =
  2. 2.85² =
  3. 3.64² =
  4. 4.49² =
  5. 5.89² =
  6. 6.92² =
  7. 7.45² =
  8. 8.69² =
  9. 9.43² =
  10. 10.84² =
  11. 11.53² =
  12. 12.71² =
  13. 13.51² =
  14. 14.66² =
  15. 15.73² =
  16. 16.39² =
  17. 17.91² =
  18. 18.65² =
  19. 19.78² =
  20. 20.34² =
  21. 21.54² =
  22. 22.61² =
  23. 23.87² =
  24. 24.31² =
  25. 25.41² =
  26. 26.44² =
  27. 27.63² =
  28. 28.96² =
  29. 29.88² =
  30. 30.58² =
  31. 31.48² =
  32. 32.52² =
  33. 33.67² =
  34. 34.86² =
  35. 35.99² =
  36. 36.36² =
  37. 37.35² =
  38. 38.95² =
  39. 39.79² =
  40. 40.81² =

Answer key

  1. 1024
  2. 7225
  3. 4096
  4. 2401
  5. 7921
  6. 8464
  7. 2025
  8. 4761
  9. 1849
  10. 7056
  11. 2809
  12. 5041
  13. 2601
  14. 4356
  15. 5329
  16. 1521
  17. 8281
  18. 4225
  19. 6084
  20. 1156
  21. 2916
  22. 3721
  23. 7569
  24. 961
  25. 1681
  26. 1936
  27. 3969
  28. 9216
  29. 7744
  30. 3364
  31. 2304
  32. 2704
  33. 4489
  34. 7396
  35. 9801
  36. 1296
  37. 1225
  38. 9025
  39. 6241
  40. 6561

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