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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 574 · 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. 1.51² =
  2. 2.73² =
  3. 3.44² =
  4. 4.63² =
  5. 5.91² =
  6. 6.35² =
  7. 7.83² =
  8. 8.77² =
  9. 9.92² =
  10. 10.88² =
  11. 11.94² =
  12. 12.59² =
  13. 13.62² =
  14. 14.99² =
  15. 15.71² =
  16. 16.69² =
  17. 17.78² =
  18. 18.33² =
  19. 19.64² =
  20. 20.84² =
  21. 21.49² =
  22. 22.95² =
  23. 23.41² =
  24. 24.52² =
  25. 25.39² =
  26. 26.61² =
  27. 27.82² =
  28. 28.74² =
  29. 29.36² =
  30. 30.38² =
  31. 31.81² =
  32. 32.47² =
  33. 33.31² =
  34. 34.66² =
  35. 35.37² =
  36. 36.65² =
  37. 37.98² =
  38. 38.48² =
  39. 39.55² =
  40. 40.96² =

Answer key

  1. 2601
  2. 5329
  3. 1936
  4. 3969
  5. 8281
  6. 1225
  7. 6889
  8. 5929
  9. 8464
  10. 7744
  11. 8836
  12. 3481
  13. 3844
  14. 9801
  15. 5041
  16. 4761
  17. 6084
  18. 1089
  19. 4096
  20. 7056
  21. 2401
  22. 9025
  23. 1681
  24. 2704
  25. 1521
  26. 3721
  27. 6724
  28. 5476
  29. 1296
  30. 1444
  31. 6561
  32. 2209
  33. 961
  34. 4356
  35. 1369
  36. 4225
  37. 9604
  38. 2304
  39. 3025
  40. 9216

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