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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 624 · 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. 1.95² =
  2. 2.98² =
  3. 3.44² =
  4. 4.79² =
  5. 5.55² =
  6. 6.56² =
  7. 7.33² =
  8. 8.91² =
  9. 9.54² =
  10. 10.94² =
  11. 11.72² =
  12. 12.43² =
  13. 13.84² =
  14. 14.32² =
  15. 15.81² =
  16. 16.53² =
  17. 17.67² =
  18. 18.36² =
  19. 19.52² =
  20. 20.89² =
  21. 21.37² =
  22. 22.66² =
  23. 23.35² =
  24. 24.83² =
  25. 25.48² =
  26. 26.39² =
  27. 27.73² =
  28. 28.51² =
  29. 29.47² =
  30. 30.63² =
  31. 31.85² =
  32. 32.75² =
  33. 33.88² =
  34. 34.45² =
  35. 35.69² =
  36. 36.74² =
  37. 37.59² =
  38. 38.42² =
  39. 39.77² =
  40. 40.46² =

Answer key

  1. 9025
  2. 9604
  3. 1936
  4. 6241
  5. 3025
  6. 3136
  7. 1089
  8. 8281
  9. 2916
  10. 8836
  11. 5184
  12. 1849
  13. 7056
  14. 1024
  15. 6561
  16. 2809
  17. 4489
  18. 1296
  19. 2704
  20. 7921
  21. 1369
  22. 4356
  23. 1225
  24. 6889
  25. 2304
  26. 1521
  27. 5329
  28. 2601
  29. 2209
  30. 3969
  31. 7225
  32. 5625
  33. 7744
  34. 2025
  35. 4761
  36. 5476
  37. 3481
  38. 1764
  39. 5929
  40. 2116

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