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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 791 · 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. 1.88² =
  2. 2.78² =
  3. 3.63² =
  4. 4.75² =
  5. 5.55² =
  6. 6.58² =
  7. 7.62² =
  8. 8.74² =
  9. 9.85² =
  10. 10.82² =
  11. 11.35² =
  12. 12.84² =
  13. 13.31² =
  14. 14.54² =
  15. 15.71² =
  16. 16.76² =
  17. 17.69² =
  18. 18.68² =
  19. 19.65² =
  20. 20.39² =
  21. 21.57² =
  22. 22.92² =
  23. 23.41² =
  24. 24.33² =
  25. 25.45² =
  26. 26.79² =
  27. 27.49² =
  28. 28.77² =
  29. 29.98² =
  30. 30.48² =
  31. 31.72² =
  32. 32.73² =
  33. 33.61² =
  34. 34.89² =
  35. 35.59² =
  36. 36.67² =
  37. 37.95² =
  38. 38.37² =
  39. 39.81² =
  40. 40.32² =

Answer key

  1. 7744
  2. 6084
  3. 3969
  4. 5625
  5. 3025
  6. 3364
  7. 3844
  8. 5476
  9. 7225
  10. 6724
  11. 1225
  12. 7056
  13. 961
  14. 2916
  15. 5041
  16. 5776
  17. 4761
  18. 4624
  19. 4225
  20. 1521
  21. 3249
  22. 8464
  23. 1681
  24. 1089
  25. 2025
  26. 6241
  27. 2401
  28. 5929
  29. 9604
  30. 2304
  31. 5184
  32. 5329
  33. 3721
  34. 7921
  35. 3481
  36. 4489
  37. 9025
  38. 1369
  39. 6561
  40. 1024

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