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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 298 · 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. 1.41² =
  2. 2.63² =
  3. 3.48² =
  4. 4.36² =
  5. 5.94² =
  6. 6.59² =
  7. 7.75² =
  8. 8.93² =
  9. 9.31² =
  10. 10.69² =
  11. 11.81² =
  12. 12.51² =
  13. 13.61² =
  14. 14.44² =
  15. 15.37² =
  16. 16.43² =
  17. 17.76² =
  18. 18.54² =
  19. 19.95² =
  20. 20.62² =
  21. 21.52² =
  22. 22.89² =
  23. 23.98² =
  24. 24.91² =
  25. 25.97² =
  26. 26.33² =
  27. 27.49² =
  28. 28.64² =
  29. 29.86² =
  30. 30.32² =
  31. 31.99² =
  32. 32.88² =
  33. 33.92² =
  34. 34.38² =
  35. 35.74² =
  36. 36.67² =
  37. 37.56² =
  38. 38.83² =
  39. 39.66² =
  40. 40.87² =

Answer key

  1. 1681
  2. 3969
  3. 2304
  4. 1296
  5. 8836
  6. 3481
  7. 5625
  8. 8649
  9. 961
  10. 4761
  11. 6561
  12. 2601
  13. 3721
  14. 1936
  15. 1369
  16. 1849
  17. 5776
  18. 2916
  19. 9025
  20. 3844
  21. 2704
  22. 7921
  23. 9604
  24. 8281
  25. 9409
  26. 1089
  27. 2401
  28. 4096
  29. 7396
  30. 1024
  31. 9801
  32. 7744
  33. 8464
  34. 1444
  35. 5476
  36. 4489
  37. 3136
  38. 6889
  39. 4356
  40. 7569

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