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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 132 · 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. 1.68² =
  2. 2.41² =
  3. 3.42² =
  4. 4.43² =
  5. 5.66² =
  6. 6.62² =
  7. 7.36² =
  8. 8.91² =
  9. 9.59² =
  10. 10.72² =
  11. 11.85² =
  12. 12.81² =
  13. 13.44² =
  14. 14.69² =
  15. 15.71² =
  16. 16.89² =
  17. 17.55² =
  18. 18.86² =
  19. 19.45² =
  20. 20.31² =
  21. 21.35² =
  22. 22.99² =
  23. 23.33² =
  24. 24.61² =
  25. 25.38² =
  26. 26.77² =
  27. 27.92² =
  28. 28.57² =
  29. 29.56² =
  30. 30.32² =
  31. 31.54² =
  32. 32.79² =
  33. 33.82² =
  34. 34.34² =
  35. 35.58² =
  36. 36.94² =
  37. 37.97² =
  38. 38.47² =
  39. 39.48² =
  40. 40.98² =

Answer key

  1. 4624
  2. 1681
  3. 1764
  4. 1849
  5. 4356
  6. 3844
  7. 1296
  8. 8281
  9. 3481
  10. 5184
  11. 7225
  12. 6561
  13. 1936
  14. 4761
  15. 5041
  16. 7921
  17. 3025
  18. 7396
  19. 2025
  20. 961
  21. 1225
  22. 9801
  23. 1089
  24. 3721
  25. 1444
  26. 5929
  27. 8464
  28. 3249
  29. 3136
  30. 1024
  31. 2916
  32. 6241
  33. 6724
  34. 1156
  35. 3364
  36. 8836
  37. 9409
  38. 2209
  39. 2304
  40. 9604

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