Question

20．直接寫(xiě)得數(shù)
$\frac{5}{14}$×7=$\frac{5}{2}$；1÷$\frac{5}{6}$=$\frac{6}{5}$；$\frac{4}{9}$×$\frac{6}{11}$=$\frac{8}{33}$；$\frac{7}{12}$÷$\frac{7}{4}$=$\frac{1}{3}$
20÷$\frac{1}{15}$=300；$\frac{8}{15}$÷8=$\frac{1}{15}$；1÷9×$\frac{1}{9}$=$\frac{1}{81}$；3-2$\frac{2}{3}$=$\frac{1}{3}$．

Answer 1

分析 根據(jù)分?jǐn)?shù)減法、分?jǐn)?shù)乘法、分?jǐn)?shù)除法的計(jì)算法則，依次進(jìn)行解答即可．

解答 解：直接寫(xiě)得數(shù)
$\frac{5}{14}$×7=$\frac{5}{2}$；1÷$\frac{5}{6}$=$\frac{6}{5}$；$\frac{4}{9}$×$\frac{6}{11}$=$\frac{8}{33}$；$\frac{7}{12}$÷$\frac{7}{4}$=$\frac{1}{3}$
20÷$\frac{1}{15}$=300；$\frac{8}{15}$÷8=$\frac{1}{15}$；1÷9×$\frac{1}{9}$=$\frac{1}{81}$；3-2$\frac{2}{3}$=$\frac{1}{3}$．

點(diǎn)評(píng) 明確分?jǐn)?shù)減法、分?jǐn)?shù)乘法、分?jǐn)?shù)除法的計(jì)算法則，是解答此題的關(guān)鍵．