Cách làm cho bạn:
Ta có :
a. $2,04:(-3,12)=\frac{-204}{312}=\frac{-51}{78}$
b. $(-1\frac{1}{2}):1,25=\frac{-3}{2}:\frac{125}{100}=\frac{-3}{2}.\frac{20}{25}=\frac{-60}{50}=\frac{-6}{5}$
c. $4:5\frac{3}{4}=4:\frac{23}{4}=4.\frac{4}{23}=\frac{16}{23}$
d. $1\frac{3}{7}:5\frac{3}{14}=\frac{\frac{73}{7}}{\frac{73}{14}}=\frac{14}{7}=2$
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