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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 98 · 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. 1.91² =
  2. 2.67² =
  3. 3.82² =
  4. 4.61² =
  5. 5.41² =
  6. 6.38² =
  7. 7.66² =
  8. 8.47² =
  9. 9.63² =
  10. 10.81² =
  11. 11.74² =
  12. 12.97² =
  13. 13.86² =
  14. 14.75² =
  15. 15.77² =
  16. 16.71² =
  17. 17.55² =
  18. 18.37² =
  19. 19.73² =
  20. 20.52² =
  21. 21.87² =
  22. 22.68² =
  23. 23.64² =
  24. 24.31² =
  25. 25.39² =
  26. 26.46² =
  27. 27.94² =
  28. 28.93² =
  29. 29.35² =
  30. 30.96² =
  31. 31.43² =
  32. 32.57² =
  33. 33.88² =
  34. 34.84² =
  35. 35.76² =
  36. 36.59² =
  37. 37.98² =
  38. 38.36² =
  39. 39.79² =
  40. 40.78² =

Answer key

  1. 8281
  2. 4489
  3. 6724
  4. 3721
  5. 1681
  6. 1444
  7. 4356
  8. 2209
  9. 3969
  10. 6561
  11. 5476
  12. 9409
  13. 7396
  14. 5625
  15. 5929
  16. 5041
  17. 3025
  18. 1369
  19. 5329
  20. 2704
  21. 7569
  22. 4624
  23. 4096
  24. 961
  25. 1521
  26. 2116
  27. 8836
  28. 8649
  29. 1225
  30. 9216
  31. 1849
  32. 3249
  33. 7744
  34. 7056
  35. 5776
  36. 3481
  37. 9604
  38. 1296
  39. 6241
  40. 6084

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