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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 75 · 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. 2.84² =
  3. 3.39² =
  4. 4.51² =
  5. 5.92² =
  6. 6.34² =
  7. 7.41² =
  8. 8.99² =
  9. 9.35² =
  10. 10.62² =
  11. 11.43² =
  12. 12.69² =
  13. 13.45² =
  14. 14.54² =
  15. 15.47² =
  16. 16.82² =
  17. 17.79² =
  18. 18.46² =
  19. 19.53² =
  20. 20.61² =
  21. 21.48² =
  22. 22.93² =
  23. 23.76² =
  24. 24.68² =
  25. 25.57² =
  26. 26.49² =
  27. 27.89² =
  28. 28.81² =
  29. 29.72² =
  30. 30.56² =
  31. 31.96² =
  32. 32.78² =
  33. 33.38² =
  34. 34.73² =
  35. 35.71² =
  36. 36.94² =
  37. 37.88² =
  38. 38.55² =
  39. 39.65² =
  40. 40.33² =

Answer key

  1. 8281
  2. 7056
  3. 1521
  4. 2601
  5. 8464
  6. 1156
  7. 1681
  8. 9801
  9. 1225
  10. 3844
  11. 1849
  12. 4761
  13. 2025
  14. 2916
  15. 2209
  16. 6724
  17. 6241
  18. 2116
  19. 2809
  20. 3721
  21. 2304
  22. 8649
  23. 5776
  24. 4624
  25. 3249
  26. 2401
  27. 7921
  28. 6561
  29. 5184
  30. 3136
  31. 9216
  32. 6084
  33. 1444
  34. 5329
  35. 5041
  36. 8836
  37. 7744
  38. 3025
  39. 4225
  40. 1089

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