• $-\mathrm{1,2}\mathrm{\square }-\mathrm{0,8}-1\{,\}2\backslash \; \backslash square-0\{,\}8$ : Vergleiche die Lage der beiden Zahlen auf der Zahlengeraden

$\Rightarrow \backslash Rightarrow$

• ${\displaystyle \frac{80}{100}}\mathrm{\square }{\displaystyle \frac{4}{5}}\backslash dfrac\{80\}\{100\}\; \backslash square\; \backslash dfrac\{4\}\{5\}$ : Kürze durch 20: ${\displaystyle \frac{80:20}{100:20}}={\displaystyle \frac{4}{5}}\backslash dfrac\{80:20\}\{100:20\}=\backslash dfrac\{4\}\{5\}$ $\Rightarrow \backslash Rightarrow$ ${\displaystyle \frac{80}{100}}={\displaystyle \frac{4}{5}}\backslash dfrac\{80\}\{100\}=\backslash dfrac\{4\}\{5\}$

• $\mathrm{0,8}\mathrm{\square }{\displaystyle \frac{3}{4}}0\{,\}8\; \backslash square\backslash \; \backslash dfrac\{3\}\{4\}$: Wandle ${\displaystyle \frac{3}{4}}\backslash dfrac\{3\}\{4\}$ in eine Dezimalzahl um: $3:4=\mathrm{0,75}3:4=0\{,\}75$ $\Rightarrow \backslash Rightarrow$ $\mathrm{0,8}>{\displaystyle \frac{3}{4}}0\{,\}8>\backslash dfrac\{3\}\{4\}$