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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 987 · 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. 1.89² =
  2. 2.73² =
  3. 3.54² =
  4. 4.39² =
  5. 5.51² =
  6. 6.48² =
  7. 7.94² =
  8. 8.76² =
  9. 9.47² =
  10. 10.43² =
  11. 11.72² =
  12. 12.62² =
  13. 13.46² =
  14. 14.63² =
  15. 15.79² =
  16. 16.96² =
  17. 17.78² =
  18. 18.69² =
  19. 19.75² =
  20. 20.35² =
  21. 21.77² =
  22. 22.33² =
  23. 23.85² =
  24. 24.86² =
  25. 25.36² =
  26. 26.41² =
  27. 27.71² =
  28. 28.91² =
  29. 29.64² =
  30. 30.56² =
  31. 31.95² =
  32. 32.66² =
  33. 33.84² =
  34. 34.87² =
  35. 35.37² =
  36. 36.61² =
  37. 37.98² =
  38. 38.53² =
  39. 39.34² =
  40. 40.67² =

Answer key

  1. 7921
  2. 5329
  3. 2916
  4. 1521
  5. 2601
  6. 2304
  7. 8836
  8. 5776
  9. 2209
  10. 1849
  11. 5184
  12. 3844
  13. 2116
  14. 3969
  15. 6241
  16. 9216
  17. 6084
  18. 4761
  19. 5625
  20. 1225
  21. 5929
  22. 1089
  23. 7225
  24. 7396
  25. 1296
  26. 1681
  27. 5041
  28. 8281
  29. 4096
  30. 3136
  31. 9025
  32. 4356
  33. 7056
  34. 7569
  35. 1369
  36. 3721
  37. 9604
  38. 2809
  39. 1156
  40. 4489

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