The addition and subtraction of fractions

5. Find the result of these additions and subtractions of fractions.

First do these operations on a piece of paper and then type the outcome here.

-Type its numerator first, then type its denominator, and when you hit Enter again you will get the message CORRECT or WRONG.

This activitiy doesn't allow any corrections.
- When you click on Init another fraction will appear. Do this activity several times.

  Eduardo Barbero Corral
Spanish Ministry of Education. Year 2007

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