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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 489 · 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. 1.99² =
  2. 2.37² =
  3. 3.69² =
  4. 4.46² =
  5. 5.62² =
  6. 6.35² =
  7. 7.63² =
  8. 8.49² =
  9. 9.72² =
  10. 10.82² =
  11. 11.78² =
  12. 12.73² =
  13. 13.31² =
  14. 14.53² =
  15. 15.83² =
  16. 16.34² =
  17. 17.59² =
  18. 18.42² =
  19. 19.48² =
  20. 20.92² =
  21. 21.68² =
  22. 22.76² =
  23. 23.39² =
  24. 24.91² =
  25. 25.98² =
  26. 26.47² =
  27. 27.66² =
  28. 28.36² =
  29. 29.51² =
  30. 30.94² =
  31. 31.79² =
  32. 32.44² =
  33. 33.54² =
  34. 34.55² =
  35. 35.81² =
  36. 36.33² =
  37. 37.96² =
  38. 38.41² =
  39. 39.74² =
  40. 40.84² =

Answer key

  1. 9801
  2. 1369
  3. 4761
  4. 2116
  5. 3844
  6. 1225
  7. 3969
  8. 2401
  9. 5184
  10. 6724
  11. 6084
  12. 5329
  13. 961
  14. 2809
  15. 6889
  16. 1156
  17. 3481
  18. 1764
  19. 2304
  20. 8464
  21. 4624
  22. 5776
  23. 1521
  24. 8281
  25. 9604
  26. 2209
  27. 4356
  28. 1296
  29. 2601
  30. 8836
  31. 6241
  32. 1936
  33. 2916
  34. 3025
  35. 6561
  36. 1089
  37. 9216
  38. 1681
  39. 5476
  40. 7056

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