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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 543 · 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. 1.91² =
  2. 2.78² =
  3. 3.44² =
  4. 4.75² =
  5. 5.86² =
  6. 6.85² =
  7. 7.43² =
  8. 8.68² =
  9. 9.31² =
  10. 10.96² =
  11. 11.33² =
  12. 12.79² =
  13. 13.63² =
  14. 14.83² =
  15. 15.69² =
  16. 16.59² =
  17. 17.82² =
  18. 18.64² =
  19. 19.35² =
  20. 20.71² =
  21. 21.94² =
  22. 22.57² =
  23. 23.36² =
  24. 24.98² =
  25. 25.45² =
  26. 26.89² =
  27. 27.81² =
  28. 28.41² =
  29. 29.58² =
  30. 30.32² =
  31. 31.56² =
  32. 32.72² =
  33. 33.51² =
  34. 34.39² =
  35. 35.55² =
  36. 36.49² =
  37. 37.38² =
  38. 38.93² =
  39. 39.88² =
  40. 40.48² =

Answer key

  1. 8281
  2. 6084
  3. 1936
  4. 5625
  5. 7396
  6. 7225
  7. 1849
  8. 4624
  9. 961
  10. 9216
  11. 1089
  12. 6241
  13. 3969
  14. 6889
  15. 4761
  16. 3481
  17. 6724
  18. 4096
  19. 1225
  20. 5041
  21. 8836
  22. 3249
  23. 1296
  24. 9604
  25. 2025
  26. 7921
  27. 6561
  28. 1681
  29. 3364
  30. 1024
  31. 3136
  32. 5184
  33. 2601
  34. 1521
  35. 3025
  36. 2401
  37. 1444
  38. 8649
  39. 7744
  40. 2304

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