Question

18．計(jì)算下面各題

$\frac{36}{49}$×$\frac{7}{12}$	$\frac{2}{27}$×$\frac{9}{10}$	$\frac{91}{25}$×$\frac{100}{13}$
$\frac{28}{33}$×$\frac{22}{35}$×$\frac{2}{5}$	48×$\frac{3}{4}$×$\frac{7}{6}$	$\frac{4}{5}$×$\frac{5}{16}$×600

Answer 1

分析 本題根據(jù)分?jǐn)?shù)乘法的運(yùn)算法則計(jì)算即可：分?jǐn)?shù)乘整數(shù)時(shí)，用分?jǐn)?shù)的分子和整數(shù)相乘的積做分子，分母不變．分?jǐn)?shù)乘分?jǐn)?shù)，用分子相乘的積做分子，分母相乘的積做分母，能約分的要約成最簡分?jǐn)?shù)．據(jù)此計(jì)算即可．

解答 解：

$\frac{36}{49}$×$\frac{7}{12}$=$\frac{3}{7}$	$\frac{2}{27}$×$\frac{9}{10}$=$\frac{1}{15}$	$\frac{91}{25}$×$\frac{100}{13}$=28
$\frac{28}{33}$×$\frac{22}{35}$×$\frac{2}{5}$=$\frac{16}{75}$	48×$\frac{3}{4}$×$\frac{7}{6}$=42	$\frac{4}{5}$×$\frac{5}{16}$×600=150

點(diǎn)評 完成本題要注意細(xì)心分析式中數(shù)據(jù)，然后快速準(zhǔn)確得出答案．