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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 803 · 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. 2.36² =
  3. 3.61² =
  4. 4.31² =
  5. 5.98² =
  6. 6.44² =
  7. 7.71² =
  8. 8.87² =
  9. 9.62² =
  10. 10.65² =
  11. 11.39² =
  12. 12.58² =
  13. 13.52² =
  14. 14.69² =
  15. 15.78² =
  16. 16.85² =
  17. 17.92² =
  18. 18.73² =
  19. 19.57² =
  20. 20.45² =
  21. 21.51² =
  22. 22.48² =
  23. 23.66² =
  24. 24.53² =
  25. 25.86² =
  26. 26.41² =
  27. 27.93² =
  28. 28.46² =
  29. 29.91² =
  30. 30.34² =
  31. 31.89² =
  32. 32.47² =
  33. 33.81² =
  34. 34.79² =
  35. 35.83² =
  36. 36.72² =
  37. 37.37² =
  38. 38.42² =
  39. 39.68² =
  40. 40.32² =

Answer key

  1. 1849
  2. 1296
  3. 3721
  4. 961
  5. 9604
  6. 1936
  7. 5041
  8. 7569
  9. 3844
  10. 4225
  11. 1521
  12. 3364
  13. 2704
  14. 4761
  15. 6084
  16. 7225
  17. 8464
  18. 5329
  19. 3249
  20. 2025
  21. 2601
  22. 2304
  23. 4356
  24. 2809
  25. 7396
  26. 1681
  27. 8649
  28. 2116
  29. 8281
  30. 1156
  31. 7921
  32. 2209
  33. 6561
  34. 6241
  35. 6889
  36. 5184
  37. 1369
  38. 1764
  39. 4624
  40. 1024

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