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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 661 · 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. 1.34² =
  2. 2.51² =
  3. 3.58² =
  4. 4.36² =
  5. 5.81² =
  6. 6.46² =
  7. 7.62² =
  8. 8.74² =
  9. 9.56² =
  10. 10.37² =
  11. 11.61² =
  12. 12.71² =
  13. 13.68² =
  14. 14.32² =
  15. 15.64² =
  16. 16.96² =
  17. 17.99² =
  18. 18.53² =
  19. 19.91² =
  20. 20.89² =
  21. 21.41² =
  22. 22.48² =
  23. 23.35² =
  24. 24.44² =
  25. 25.66² =
  26. 26.69² =
  27. 27.79² =
  28. 28.94² =
  29. 29.88² =
  30. 30.93² =
  31. 31.98² =
  32. 32.38² =
  33. 33.49² =
  34. 34.42² =
  35. 35.84² =
  36. 36.63² =
  37. 37.54² =
  38. 38.73² =
  39. 39.75² =
  40. 40.55² =

Answer key

  1. 1156
  2. 2601
  3. 3364
  4. 1296
  5. 6561
  6. 2116
  7. 3844
  8. 5476
  9. 3136
  10. 1369
  11. 3721
  12. 5041
  13. 4624
  14. 1024
  15. 4096
  16. 9216
  17. 9801
  18. 2809
  19. 8281
  20. 7921
  21. 1681
  22. 2304
  23. 1225
  24. 1936
  25. 4356
  26. 4761
  27. 6241
  28. 8836
  29. 7744
  30. 8649
  31. 9604
  32. 1444
  33. 2401
  34. 1764
  35. 7056
  36. 3969
  37. 2916
  38. 5329
  39. 5625
  40. 3025

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