Tính: a, 38,6 + 42,78 x 1,6 : 0,001 d, 4,36 + 13,734 : 13,08 - 1,82

* Hướng dẫn giải

$$\begin{gathered} a, \\ \begin{array}{l}38,6+42,78\times 1,6:0,001\\ =38,6+42,78\times 1600\\ =38,6+68448\\ =68486,6\end{array} \\ b, \\ \begin{array}{l}4,36+13,734:13,08-1,82\\ =4,36-1,82+1,05\\ =2,54+1,05\\ =3,59\end{array} \end{gathered}$$