Question

15．計(jì)算．
$\frac{6}{7}$÷2=
$\frac{6}{7}$×$\frac{1}{6}$=
68÷10%=
$\frac{5}{8}$×72%=
$\frac{4}{5}$×$\frac{3}{8}$÷$\frac{3}{5}$=

Answer 1

分析 根據(jù)分?jǐn)?shù)乘除法的計(jì)算方法求解；含有百分?jǐn)?shù)的計(jì)算，先把百分?jǐn)?shù)化成小數(shù)再計(jì)算．

解答 解：$\frac{6}{7}$÷2=$\frac{3}{7}$
$\frac{6}{7}$×$\frac{1}{6}$=$\frac{1}{7}$
68÷10%=680
$\frac{5}{8}$×72%=0.45
$\frac{4}{5}$×$\frac{3}{8}$÷$\frac{3}{5}$=$\frac{1}{2}$

點(diǎn)評(píng) 本題屬于基本的計(jì)算，在平時(shí)注意積累經(jīng)驗(yàn)，逐步提高運(yùn)算的速度和準(zhǔn)確性．