(+1/5)+(-8/15)=

Question

0

1233

2

(+1/5)+(-8/15)=

Guest 18.11.2014

+12530

+5

Beste Antwort

$$\frac{1}{5}+\frac{-8}{15}
=\frac{1}{5}-\frac{8}{15}
=\frac{3}{15}-\frac{8}{15}
=-\frac{5}{15}
=-\frac{1}{3}$$

+ * - = -

$$\frac{1*3}{5*3}=\frac{3}{15}$$ Erweitern

$$\frac{5:5}{15:5}=\frac{1}{3}$$ Kürzen

Omi67 18.11.2014

Omi67 · Answer 1 · 2014-11-18T07:56:04

$$\frac{1}{5}+\frac{-8}{15}
=\frac{1}{5}-\frac{8}{15}
=\frac{3}{15}-\frac{8}{15}
=-\frac{5}{15}
=-\frac{1}{3}$$

+ * - = -

$$\frac{1*3}{5*3}=\frac{3}{15}$$ Erweitern

$$\frac{5:5}{15:5}=\frac{1}{3}$$ Kürzen

Gast · Answer 2 · 2014-11-18T07:52:54

=3/15-8/15=-5/15=-1/3