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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 787 · 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. 1.54² =
  2. 2.91² =
  3. 3.35² =
  4. 4.76² =
  5. 5.71² =
  6. 6.48² =
  7. 7.32² =
  8. 8.68² =
  9. 9.94² =
  10. 10.79² =
  11. 11.47² =
  12. 12.67² =
  13. 13.38² =
  14. 14.42² =
  15. 15.98² =
  16. 16.61² =
  17. 17.43² =
  18. 18.95² =
  19. 19.41² =
  20. 20.37² =
  21. 21.97² =
  22. 22.52² =
  23. 23.89² =
  24. 24.64² =
  25. 25.81² =
  26. 26.33² =
  27. 27.83² =
  28. 28.72² =
  29. 29.51² =
  30. 30.46² =
  31. 31.49² =
  32. 32.57² =
  33. 33.73² =
  34. 34.45² =
  35. 35.65² =
  36. 36.39² =
  37. 37.58² =
  38. 38.59² =
  39. 39.34² =
  40. 40.69² =

Answer key

  1. 2916
  2. 8281
  3. 1225
  4. 5776
  5. 5041
  6. 2304
  7. 1024
  8. 4624
  9. 8836
  10. 6241
  11. 2209
  12. 4489
  13. 1444
  14. 1764
  15. 9604
  16. 3721
  17. 1849
  18. 9025
  19. 1681
  20. 1369
  21. 9409
  22. 2704
  23. 7921
  24. 4096
  25. 6561
  26. 1089
  27. 6889
  28. 5184
  29. 2601
  30. 2116
  31. 2401
  32. 3249
  33. 5329
  34. 2025
  35. 4225
  36. 1521
  37. 3364
  38. 3481
  39. 1156
  40. 4761

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