Obliczmy wartości każdego z czterech wyrażeń.

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I.

$1\frac{3}{5}+0,25=1,6+0,25=1,85$  

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II.

$6\frac{2}{7}-3,75=6\frac{2}{7}-3\frac{3}{4}=6\frac{8}{28}-3\frac{21}{28}=5\frac{36}{28}-3\frac{21}{28}=2\frac{15}{28}$  

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III.

$4,8\cdot \frac{3}{16}=\frac{\sout{48}{}^3}{10}\cdot \frac{3}{\sout{16}{}_1}=\frac{9}{10}=0,9>\frac{1}{2}$   

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IV.

$1\frac{4}{15}:4,5=\frac{19}{15}:\frac{9}{2}=\frac{19}{15}\cdot \frac{2}{9}=\frac{38}{135}<\frac{1}{2}$  

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Odp. D