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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 700 · 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. 1.52² =
  2. 2.43² =
  3. 3.98² =
  4. 4.71² =
  5. 5.86² =
  6. 6.94² =
  7. 7.92² =
  8. 8.57² =
  9. 9.65² =
  10. 10.54² =
  11. 11.51² =
  12. 12.42² =
  13. 13.45² =
  14. 14.75² =
  15. 15.58² =
  16. 16.74² =
  17. 17.41² =
  18. 18.87² =
  19. 19.48² =
  20. 20.78² =
  21. 21.39² =
  22. 22.34² =
  23. 23.73² =
  24. 24.62² =
  25. 25.46² =
  26. 26.37² =
  27. 27.82² =
  28. 28.47² =
  29. 29.44² =
  30. 30.53² =
  31. 31.91² =
  32. 32.96² =
  33. 33.97² =
  34. 34.95² =
  35. 35.59² =
  36. 36.81² =
  37. 37.77² =
  38. 38.66² =
  39. 39.38² =
  40. 40.35² =

Answer key

  1. 2704
  2. 1849
  3. 9604
  4. 5041
  5. 7396
  6. 8836
  7. 8464
  8. 3249
  9. 4225
  10. 2916
  11. 2601
  12. 1764
  13. 2025
  14. 5625
  15. 3364
  16. 5476
  17. 1681
  18. 7569
  19. 2304
  20. 6084
  21. 1521
  22. 1156
  23. 5329
  24. 3844
  25. 2116
  26. 1369
  27. 6724
  28. 2209
  29. 1936
  30. 2809
  31. 8281
  32. 9216
  33. 9409
  34. 9025
  35. 3481
  36. 6561
  37. 5929
  38. 4356
  39. 1444
  40. 1225

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