Tínhd) 157,625 169 – 157,625 46 – 157,625 23

* Hướng dẫn giải

$\begin{array}{l}a)\frac{3}{6}+\frac{7}{12}=\frac{6}{12}+\frac{7}{12}=\frac{13}{12} ; b)\frac{7}{8}-\frac{5}{6}=\frac{42}{48}-\frac{40}{48}=\frac{2}{48}=\frac{1}{24}\\ c)28,75:0,15+12\times 5,71=\frac{575}{3}+\frac{1713}{25}=\frac{19514}{75}\\ d)157,625\times 169-157,625\times 46-157,25\times 23\\ =157,625\times \left(169-46-23\right)\\ =157,625\times 100=15762,5\end{array}$