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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 967 · 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. 1.63² =
  2. 2.52² =
  3. 3.97² =
  4. 4.35² =
  5. 5.37² =
  6. 6.34² =
  7. 7.72² =
  8. 8.81² =
  9. 9.54² =
  10. 10.92² =
  11. 11.86² =
  12. 12.66² =
  13. 13.41² =
  14. 14.61² =
  15. 15.74² =
  16. 16.84² =
  17. 17.44² =
  18. 18.82² =
  19. 19.65² =
  20. 20.39² =
  21. 21.87² =
  22. 22.47² =
  23. 23.51² =
  24. 24.67² =
  25. 25.69² =
  26. 26.58² =
  27. 27.48² =
  28. 28.77² =
  29. 29.59² =
  30. 30.71² =
  31. 31.89² =
  32. 32.78² =
  33. 33.49² =
  34. 34.31² =
  35. 35.94² =
  36. 36.96² =
  37. 37.76² =
  38. 38.46² =
  39. 39.85² =
  40. 40.38² =

Answer key

  1. 3969
  2. 2704
  3. 9409
  4. 1225
  5. 1369
  6. 1156
  7. 5184
  8. 6561
  9. 2916
  10. 8464
  11. 7396
  12. 4356
  13. 1681
  14. 3721
  15. 5476
  16. 7056
  17. 1936
  18. 6724
  19. 4225
  20. 1521
  21. 7569
  22. 2209
  23. 2601
  24. 4489
  25. 4761
  26. 3364
  27. 2304
  28. 5929
  29. 3481
  30. 5041
  31. 7921
  32. 6084
  33. 2401
  34. 961
  35. 8836
  36. 9216
  37. 5776
  38. 2116
  39. 7225
  40. 1444

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