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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 66 · 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. 1.86² =
  2. 2.66² =
  3. 3.46² =
  4. 4.47² =
  5. 5.98² =
  6. 6.32² =
  7. 7.96² =
  8. 8.91² =
  9. 9.85² =
  10. 10.87² =
  11. 11.41² =
  12. 12.38² =
  13. 13.34² =
  14. 14.72² =
  15. 15.51² =
  16. 16.76² =
  17. 17.35² =
  18. 18.49² =
  19. 19.42² =
  20. 20.81² =
  21. 21.31² =
  22. 22.57² =
  23. 23.43² =
  24. 24.89² =
  25. 25.94² =
  26. 26.54² =
  27. 27.69² =
  28. 28.92² =
  29. 29.52² =
  30. 30.84² =
  31. 31.63² =
  32. 32.56² =
  33. 33.33² =
  34. 34.74² =
  35. 35.55² =
  36. 36.59² =
  37. 37.48² =
  38. 38.75² =
  39. 39.95² =
  40. 40.82² =

Answer key

  1. 7396
  2. 4356
  3. 2116
  4. 2209
  5. 9604
  6. 1024
  7. 9216
  8. 8281
  9. 7225
  10. 7569
  11. 1681
  12. 1444
  13. 1156
  14. 5184
  15. 2601
  16. 5776
  17. 1225
  18. 2401
  19. 1764
  20. 6561
  21. 961
  22. 3249
  23. 1849
  24. 7921
  25. 8836
  26. 2916
  27. 4761
  28. 8464
  29. 2704
  30. 7056
  31. 3969
  32. 3136
  33. 1089
  34. 5476
  35. 3025
  36. 3481
  37. 2304
  38. 5625
  39. 9025
  40. 6724

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