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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 393 · 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. 1.43² =
  2. 2.95² =
  3. 3.74² =
  4. 4.41² =
  5. 5.68² =
  6. 6.72² =
  7. 7.93² =
  8. 8.65² =
  9. 9.37² =
  10. 10.94² =
  11. 11.59² =
  12. 12.79² =
  13. 13.36² =
  14. 14.58² =
  15. 15.69² =
  16. 16.35² =
  17. 17.77² =
  18. 18.82² =
  19. 19.46² =
  20. 20.64² =
  21. 21.91² =
  22. 22.88² =
  23. 23.87² =
  24. 24.78² =
  25. 25.48² =
  26. 26.89² =
  27. 27.34² =
  28. 28.44² =
  29. 29.32² =
  30. 30.49² =
  31. 31.42² =
  32. 32.38² =
  33. 33.98² =
  34. 34.31² =
  35. 35.86² =
  36. 36.76² =
  37. 37.57² =
  38. 38.81² =
  39. 39.71² =
  40. 40.33² =

Answer key

  1. 1849
  2. 9025
  3. 5476
  4. 1681
  5. 4624
  6. 5184
  7. 8649
  8. 4225
  9. 1369
  10. 8836
  11. 3481
  12. 6241
  13. 1296
  14. 3364
  15. 4761
  16. 1225
  17. 5929
  18. 6724
  19. 2116
  20. 4096
  21. 8281
  22. 7744
  23. 7569
  24. 6084
  25. 2304
  26. 7921
  27. 1156
  28. 1936
  29. 1024
  30. 2401
  31. 1764
  32. 1444
  33. 9604
  34. 961
  35. 7396
  36. 5776
  37. 3249
  38. 6561
  39. 5041
  40. 1089

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