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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 155 · 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. 1.56² =
  2. 2.37² =
  3. 3.81² =
  4. 4.43² =
  5. 5.86² =
  6. 6.62² =
  7. 7.79² =
  8. 8.51² =
  9. 9.82² =
  10. 10.46² =
  11. 11.35² =
  12. 12.85² =
  13. 13.58² =
  14. 14.78² =
  15. 15.34² =
  16. 16.48² =
  17. 17.64² =
  18. 18.77² =
  19. 19.72² =
  20. 20.66² =
  21. 21.95² =
  22. 22.44² =
  23. 23.73² =
  24. 24.69² =
  25. 25.41² =
  26. 26.96² =
  27. 27.61² =
  28. 28.91² =
  29. 29.75² =
  30. 30.59² =
  31. 31.55² =
  32. 32.38² =
  33. 33.84² =
  34. 34.88² =
  35. 35.97² =
  36. 36.36² =
  37. 37.33² =
  38. 38.31² =
  39. 39.39² =
  40. 40.89² =

Answer key

  1. 3136
  2. 1369
  3. 6561
  4. 1849
  5. 7396
  6. 3844
  7. 6241
  8. 2601
  9. 6724
  10. 2116
  11. 1225
  12. 7225
  13. 3364
  14. 6084
  15. 1156
  16. 2304
  17. 4096
  18. 5929
  19. 5184
  20. 4356
  21. 9025
  22. 1936
  23. 5329
  24. 4761
  25. 1681
  26. 9216
  27. 3721
  28. 8281
  29. 5625
  30. 3481
  31. 3025
  32. 1444
  33. 7056
  34. 7744
  35. 9409
  36. 1296
  37. 1089
  38. 961
  39. 1521
  40. 7921

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