Lösung 1.2:1e
Aus Online Mathematik Brückenkurs 1
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Version vom 13:26, 22. Okt. 2008
The first step is to expand the fractions so that they have a common denominator,
| \displaystyle \frac{8\cdot 4\cdot 3}{7\cdot 4\cdot 3}+\frac{3\cdot 7\cdot 3}{4\cdot 7\cdot 3}-\frac{4\cdot 7\cdot 4}{3\cdot 7\cdot 4}=\frac{96}{84}+\frac{63}{84}-\frac{112}{84}\,. |
After that, the expression can be calculated by adding and subtracting the numerators
| \displaystyle \frac{96}{84}+\frac{63}{84}-\frac{112}{84}=\frac{96+63-112}{84}=\frac{47}{84}\,. |
