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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 40 · 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. 1.33² =
  2. 2.88² =
  3. 3.58² =
  4. 4.38² =
  5. 5.61² =
  6. 6.36² =
  7. 7.97² =
  8. 8.83² =
  9. 9.34² =
  10. 10.81² =
  11. 11.55² =
  12. 12.71² =
  13. 13.31² =
  14. 14.53² =
  15. 15.54² =
  16. 16.57² =
  17. 17.35² =
  18. 18.89² =
  19. 19.82² =
  20. 20.75² =
  21. 21.98² =
  22. 22.74² =
  23. 23.68² =
  24. 24.32² =
  25. 25.49² =
  26. 26.59² =
  27. 27.48² =
  28. 28.72² =
  29. 29.37² =
  30. 30.93² =
  31. 31.64² =
  32. 32.44² =
  33. 33.99² =
  34. 34.87² =
  35. 35.51² =
  36. 36.56² =
  37. 37.85² =
  38. 38.95² =
  39. 39.52² =
  40. 40.77² =

Answer key

  1. 1089
  2. 7744
  3. 3364
  4. 1444
  5. 3721
  6. 1296
  7. 9409
  8. 6889
  9. 1156
  10. 6561
  11. 3025
  12. 5041
  13. 961
  14. 2809
  15. 2916
  16. 3249
  17. 1225
  18. 7921
  19. 6724
  20. 5625
  21. 9604
  22. 5476
  23. 4624
  24. 1024
  25. 2401
  26. 3481
  27. 2304
  28. 5184
  29. 1369
  30. 8649
  31. 4096
  32. 1936
  33. 9801
  34. 7569
  35. 2601
  36. 3136
  37. 7225
  38. 9025
  39. 2704
  40. 5929

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