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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 39 · 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. 1.43² =
  2. 2.97² =
  3. 3.34² =
  4. 4.72² =
  5. 5.91² =
  6. 6.63² =
  7. 7.38² =
  8. 8.74² =
  9. 9.79² =
  10. 10.89² =
  11. 11.95² =
  12. 12.57² =
  13. 13.92² =
  14. 14.62² =
  15. 15.58² =
  16. 16.71² =
  17. 17.31² =
  18. 18.75² =
  19. 19.44² =
  20. 20.83² =
  21. 21.61² =
  22. 22.35² =
  23. 23.98² =
  24. 24.53² =
  25. 25.45² =
  26. 26.87² =
  27. 27.81² =
  28. 28.93² =
  29. 29.67² =
  30. 30.86² =
  31. 31.48² =
  32. 32.41² =
  33. 33.56² =
  34. 34.78² =
  35. 35.37² =
  36. 36.66² =
  37. 37.76² =
  38. 38.36² =
  39. 39.54² =
  40. 40.46² =

Answer key

  1. 1849
  2. 9409
  3. 1156
  4. 5184
  5. 8281
  6. 3969
  7. 1444
  8. 5476
  9. 6241
  10. 7921
  11. 9025
  12. 3249
  13. 8464
  14. 3844
  15. 3364
  16. 5041
  17. 961
  18. 5625
  19. 1936
  20. 6889
  21. 3721
  22. 1225
  23. 9604
  24. 2809
  25. 2025
  26. 7569
  27. 6561
  28. 8649
  29. 4489
  30. 7396
  31. 2304
  32. 1681
  33. 3136
  34. 6084
  35. 1369
  36. 4356
  37. 5776
  38. 1296
  39. 2916
  40. 2116

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