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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 16 · 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. 1.44² =
  2. 2.75² =
  3. 3.43² =
  4. 4.57² =
  5. 5.55² =
  6. 6.41² =
  7. 7.38² =
  8. 8.71² =
  9. 9.32² =
  10. 10.37² =
  11. 11.63² =
  12. 12.64² =
  13. 13.58² =
  14. 14.74² =
  15. 15.42² =
  16. 16.54² =
  17. 17.72² =
  18. 18.93² =
  19. 19.46² =
  20. 20.35² =
  21. 21.45² =
  22. 22.87² =
  23. 23.79² =
  24. 24.98² =
  25. 25.61² =
  26. 26.88² =
  27. 27.49² =
  28. 28.94² =
  29. 29.77² =
  30. 30.82² =
  31. 31.47² =
  32. 32.89² =
  33. 33.31² =
  34. 34.84² =
  35. 35.65² =
  36. 36.85² =
  37. 37.99² =
  38. 38.92² =
  39. 39.48² =
  40. 40.51² =

Answer key

  1. 1936
  2. 5625
  3. 1849
  4. 3249
  5. 3025
  6. 1681
  7. 1444
  8. 5041
  9. 1024
  10. 1369
  11. 3969
  12. 4096
  13. 3364
  14. 5476
  15. 1764
  16. 2916
  17. 5184
  18. 8649
  19. 2116
  20. 1225
  21. 2025
  22. 7569
  23. 6241
  24. 9604
  25. 3721
  26. 7744
  27. 2401
  28. 8836
  29. 5929
  30. 6724
  31. 2209
  32. 7921
  33. 961
  34. 7056
  35. 4225
  36. 7225
  37. 9801
  38. 8464
  39. 2304
  40. 2601

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