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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 248 · 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. 1.87² =
  2. 2.35² =
  3. 3.48² =
  4. 4.47² =
  5. 5.53² =
  6. 6.55² =
  7. 7.77² =
  8. 8.61² =
  9. 9.69² =
  10. 10.79² =
  11. 11.56² =
  12. 12.67² =
  13. 13.72² =
  14. 14.93² =
  15. 15.71² =
  16. 16.82² =
  17. 17.99² =
  18. 18.51² =
  19. 19.94² =
  20. 20.65² =
  21. 21.54² =
  22. 22.98² =
  23. 23.49² =
  24. 24.88² =
  25. 25.31² =
  26. 26.91² =
  27. 27.33² =
  28. 28.34² =
  29. 29.66² =
  30. 30.86² =
  31. 31.59² =
  32. 32.44² =
  33. 33.32² =
  34. 34.41² =
  35. 35.89² =
  36. 36.75² =
  37. 37.95² =
  38. 38.74² =
  39. 39.64² =
  40. 40.42² =

Answer key

  1. 7569
  2. 1225
  3. 2304
  4. 2209
  5. 2809
  6. 3025
  7. 5929
  8. 3721
  9. 4761
  10. 6241
  11. 3136
  12. 4489
  13. 5184
  14. 8649
  15. 5041
  16. 6724
  17. 9801
  18. 2601
  19. 8836
  20. 4225
  21. 2916
  22. 9604
  23. 2401
  24. 7744
  25. 961
  26. 8281
  27. 1089
  28. 1156
  29. 4356
  30. 7396
  31. 3481
  32. 1936
  33. 1024
  34. 1681
  35. 7921
  36. 5625
  37. 9025
  38. 5476
  39. 4096
  40. 1764

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