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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 782 · 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. 1.84² =
  2. 2.78² =
  3. 3.33² =
  4. 4.79² =
  5. 5.42² =
  6. 6.44² =
  7. 7.73² =
  8. 8.68² =
  9. 9.64² =
  10. 10.66² =
  11. 11.82² =
  12. 12.35² =
  13. 13.63² =
  14. 14.75² =
  15. 15.77² =
  16. 16.52² =
  17. 17.41² =
  18. 18.99² =
  19. 19.61² =
  20. 20.88² =
  21. 21.55² =
  22. 22.95² =
  23. 23.72² =
  24. 24.71² =
  25. 25.48² =
  26. 26.51² =
  27. 27.87² =
  28. 28.81² =
  29. 29.32² =
  30. 30.91² =
  31. 31.85² =
  32. 32.47² =
  33. 33.39² =
  34. 34.94² =
  35. 35.49² =
  36. 36.97² =
  37. 37.69² =
  38. 38.59² =
  39. 39.62² =
  40. 40.86² =

Answer key

  1. 7056
  2. 6084
  3. 1089
  4. 6241
  5. 1764
  6. 1936
  7. 5329
  8. 4624
  9. 4096
  10. 4356
  11. 6724
  12. 1225
  13. 3969
  14. 5625
  15. 5929
  16. 2704
  17. 1681
  18. 9801
  19. 3721
  20. 7744
  21. 3025
  22. 9025
  23. 5184
  24. 5041
  25. 2304
  26. 2601
  27. 7569
  28. 6561
  29. 1024
  30. 8281
  31. 7225
  32. 2209
  33. 1521
  34. 8836
  35. 2401
  36. 9409
  37. 4761
  38. 3481
  39. 3844
  40. 7396

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