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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 163 · 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. 1.61² =
  2. 2.74² =
  3. 3.31² =
  4. 4.54² =
  5. 5.64² =
  6. 6.38² =
  7. 7.98² =
  8. 8.89² =
  9. 9.51² =
  10. 10.33² =
  11. 11.59² =
  12. 12.68² =
  13. 13.81² =
  14. 14.37² =
  15. 15.99² =
  16. 16.96² =
  17. 17.93² =
  18. 18.35² =
  19. 19.82² =
  20. 20.42² =
  21. 21.92² =
  22. 22.95² =
  23. 23.97² =
  24. 24.91² =
  25. 25.49² =
  26. 26.63² =
  27. 27.71² =
  28. 28.44² =
  29. 29.62² =
  30. 30.84² =
  31. 31.65² =
  32. 32.53² =
  33. 33.43² =
  34. 34.46² =
  35. 35.48² =
  36. 36.39² =
  37. 37.72² =
  38. 38.55² =
  39. 39.34² =
  40. 40.57² =

Answer key

  1. 3721
  2. 5476
  3. 961
  4. 2916
  5. 4096
  6. 1444
  7. 9604
  8. 7921
  9. 2601
  10. 1089
  11. 3481
  12. 4624
  13. 6561
  14. 1369
  15. 9801
  16. 9216
  17. 8649
  18. 1225
  19. 6724
  20. 1764
  21. 8464
  22. 9025
  23. 9409
  24. 8281
  25. 2401
  26. 3969
  27. 5041
  28. 1936
  29. 3844
  30. 7056
  31. 4225
  32. 2809
  33. 1849
  34. 2116
  35. 2304
  36. 1521
  37. 5184
  38. 3025
  39. 1156
  40. 3249

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