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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 237 · 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. 2.84² =
  3. 3.44² =
  4. 4.91² =
  5. 5.51² =
  6. 6.54² =
  7. 7.77² =
  8. 8.81² =
  9. 9.79² =
  10. 10.63² =
  11. 11.37² =
  12. 12.87² =
  13. 13.32² =
  14. 14.85² =
  15. 15.75² =
  16. 16.82² =
  17. 17.47² =
  18. 18.95² =
  19. 19.46² =
  20. 20.78² =
  21. 21.59² =
  22. 22.36² =
  23. 23.35² =
  24. 24.61² =
  25. 25.41² =
  26. 26.73² =
  27. 27.62² =
  28. 28.53² =
  29. 29.34² =
  30. 30.68² =
  31. 31.43² =
  32. 32.72² =
  33. 33.64² =
  34. 34.66² =
  35. 35.96² =
  36. 36.86² =
  37. 37.69² =
  38. 38.39² =
  39. 39.88² =
  40. 40.71² =

Answer key

  1. 1089
  2. 7056
  3. 1936
  4. 8281
  5. 2601
  6. 2916
  7. 5929
  8. 6561
  9. 6241
  10. 3969
  11. 1369
  12. 7569
  13. 1024
  14. 7225
  15. 5625
  16. 6724
  17. 2209
  18. 9025
  19. 2116
  20. 6084
  21. 3481
  22. 1296
  23. 1225
  24. 3721
  25. 1681
  26. 5329
  27. 3844
  28. 2809
  29. 1156
  30. 4624
  31. 1849
  32. 5184
  33. 4096
  34. 4356
  35. 9216
  36. 7396
  37. 4761
  38. 1521
  39. 7744
  40. 5041

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