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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 538 · 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. 1.96² =
  2. 2.37² =
  3. 3.53² =
  4. 4.91² =
  5. 5.81² =
  6. 6.61² =
  7. 7.92² =
  8. 8.41² =
  9. 9.52² =
  10. 10.51² =
  11. 11.55² =
  12. 12.82² =
  13. 13.57² =
  14. 14.95² =
  15. 15.45² =
  16. 16.42² =
  17. 17.31² =
  18. 18.47² =
  19. 19.56² =
  20. 20.48² =
  21. 21.46² =
  22. 22.99² =
  23. 23.39² =
  24. 24.94² =
  25. 25.98² =
  26. 26.74² =
  27. 27.63² =
  28. 28.32² =
  29. 29.72² =
  30. 30.58² =
  31. 31.78² =
  32. 32.33² =
  33. 33.49² =
  34. 34.83² =
  35. 35.64² =
  36. 36.88² =
  37. 37.76² =
  38. 38.89² =
  39. 39.79² =
  40. 40.97² =

Answer key

  1. 9216
  2. 1369
  3. 2809
  4. 8281
  5. 6561
  6. 3721
  7. 8464
  8. 1681
  9. 2704
  10. 2601
  11. 3025
  12. 6724
  13. 3249
  14. 9025
  15. 2025
  16. 1764
  17. 961
  18. 2209
  19. 3136
  20. 2304
  21. 2116
  22. 9801
  23. 1521
  24. 8836
  25. 9604
  26. 5476
  27. 3969
  28. 1024
  29. 5184
  30. 3364
  31. 6084
  32. 1089
  33. 2401
  34. 6889
  35. 4096
  36. 7744
  37. 5776
  38. 7921
  39. 6241
  40. 9409

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