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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 694 · 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. 1.35² =
  2. 2.34² =
  3. 3.41² =
  4. 4.63² =
  5. 5.71² =
  6. 6.79² =
  7. 7.37² =
  8. 8.91² =
  9. 9.89² =
  10. 10.61² =
  11. 11.66² =
  12. 12.59² =
  13. 13.39² =
  14. 14.38² =
  15. 15.51² =
  16. 16.49² =
  17. 17.94² =
  18. 18.73² =
  19. 19.58² =
  20. 20.46² =
  21. 21.95² =
  22. 22.36² =
  23. 23.98² =
  24. 24.47² =
  25. 25.54² =
  26. 26.86² =
  27. 27.85² =
  28. 28.69² =
  29. 29.42² =
  30. 30.48² =
  31. 31.31² =
  32. 32.87² =
  33. 33.72² =
  34. 34.97² =
  35. 35.99² =
  36. 36.64² =
  37. 37.81² =
  38. 38.82² =
  39. 39.33² =
  40. 40.56² =

Answer key

  1. 1225
  2. 1156
  3. 1681
  4. 3969
  5. 5041
  6. 6241
  7. 1369
  8. 8281
  9. 7921
  10. 3721
  11. 4356
  12. 3481
  13. 1521
  14. 1444
  15. 2601
  16. 2401
  17. 8836
  18. 5329
  19. 3364
  20. 2116
  21. 9025
  22. 1296
  23. 9604
  24. 2209
  25. 2916
  26. 7396
  27. 7225
  28. 4761
  29. 1764
  30. 2304
  31. 961
  32. 7569
  33. 5184
  34. 9409
  35. 9801
  36. 4096
  37. 6561
  38. 6724
  39. 1089
  40. 3136

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