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Squaring 2-Digit Numbers Mentally Worksheet

Mental maths lesson 23: Square any 2-digit number: up and down · Set 528 · 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. 1.41² =
  2. 2.49² =
  3. 3.31² =
  4. 4.62² =
  5. 5.89² =
  6. 6.92² =
  7. 7.54² =
  8. 8.85² =
  9. 9.71² =
  10. 10.74² =
  11. 11.66² =
  12. 12.55² =
  13. 13.99² =
  14. 14.83² =
  15. 15.43² =
  16. 16.45² =
  17. 17.36² =
  18. 18.67² =
  19. 19.52² =
  20. 20.48² =
  21. 21.35² =
  22. 22.82² =
  23. 23.33² =
  24. 24.79² =
  25. 25.91² =
  26. 26.97² =
  27. 27.84² =
  28. 28.44² =
  29. 29.51² =
  30. 30.61² =
  31. 31.34² =
  32. 32.58² =
  33. 33.56² =
  34. 34.37² =
  35. 35.75² =
  36. 36.65² =
  37. 37.94² =
  38. 38.88² =
  39. 39.42² =
  40. 40.78² =

Answer key

  1. 1681
  2. 2401
  3. 961
  4. 3844
  5. 7921
  6. 8464
  7. 2916
  8. 7225
  9. 5041
  10. 5476
  11. 4356
  12. 3025
  13. 9801
  14. 6889
  15. 1849
  16. 2025
  17. 1296
  18. 4489
  19. 2704
  20. 2304
  21. 1225
  22. 6724
  23. 1089
  24. 6241
  25. 8281
  26. 9409
  27. 7056
  28. 1936
  29. 2601
  30. 3721
  31. 1156
  32. 3364
  33. 3136
  34. 1369
  35. 5625
  36. 4225
  37. 8836
  38. 7744
  39. 1764
  40. 6084

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