Question

15．直接寫(xiě)出得數(shù)．
$\frac{5}{18}$×0.36=
1$\frac{4}{5}$÷$\frac{3}{10}$=
$\frac{1}{2}$×$\frac{1}{3}$÷$\frac{1}{3}$×$\frac{1}{2}$=
3-$\frac{3}{7}$÷3=

Answer 1

分析 根據(jù)分?jǐn)?shù)乘除法的計(jì)算方法計(jì)算．
$\frac{5}{18}$×0.36中的18和0.36同時(shí)除以18，再算5×0.02；
1$\frac{4}{5}$÷$\frac{3}{10}$化成小數(shù)計(jì)算；
$\frac{1}{2}$×$\frac{1}{3}$÷$\frac{1}{3}$×$\frac{1}{2}$先算$\frac{1}{3}÷\frac{1}{3}=1$，再算$\frac{1}{2}×\frac{1}{2}×1$．

解答 解：$\frac{5}{18}$×0.36=0.1
1$\frac{4}{5}$÷$\frac{3}{10}$=6
$\frac{1}{2}$×$\frac{1}{3}$÷$\frac{1}{3}$×$\frac{1}{2}$=$\frac{1}{4}$
3-$\frac{3}{7}$÷3=2$\frac{6}{7}$

點(diǎn)評(píng) 本題考查了分?jǐn)?shù)乘除法的口算能力，要靈活計(jì)算．