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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 539 · 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. 1.95² =
  2. 2.49² =
  3. 3.68² =
  4. 4.46² =
  5. 5.86² =
  6. 6.92² =
  7. 7.53² =
  8. 8.51² =
  9. 9.65² =
  10. 10.31² =
  11. 11.33² =
  12. 12.71² =
  13. 13.88² =
  14. 14.32² =
  15. 15.58² =
  16. 16.54² =
  17. 17.93² =
  18. 18.96² =
  19. 19.42² =
  20. 20.66² =
  21. 21.76² =
  22. 22.48² =
  23. 23.39² =
  24. 24.84² =
  25. 25.61² =
  26. 26.62² =
  27. 27.81² =
  28. 28.99² =
  29. 29.74² =
  30. 30.41² =
  31. 31.55² =
  32. 32.35² =
  33. 33.73² =
  34. 34.44² =
  35. 35.37² =
  36. 36.79² =
  37. 37.36² =
  38. 38.82² =
  39. 39.57² =
  40. 40.67² =

Answer key

  1. 9025
  2. 2401
  3. 4624
  4. 2116
  5. 7396
  6. 8464
  7. 2809
  8. 2601
  9. 4225
  10. 961
  11. 1089
  12. 5041
  13. 7744
  14. 1024
  15. 3364
  16. 2916
  17. 8649
  18. 9216
  19. 1764
  20. 4356
  21. 5776
  22. 2304
  23. 1521
  24. 7056
  25. 3721
  26. 3844
  27. 6561
  28. 9801
  29. 5476
  30. 1681
  31. 3025
  32. 1225
  33. 5329
  34. 1936
  35. 1369
  36. 6241
  37. 1296
  38. 6724
  39. 3249
  40. 4489

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