Question

17．直接寫出得數(shù)．

1÷$\frac{4}{9}$=	$\frac{3}{4}$×$\frac{5}{9}$=	$\frac{2}{3}$+$\frac{1}{4}$=	5-1.4-1.6=	$\frac{11}{12}$÷22=
1.4-0.6=	$\frac{7}{8}$×$\frac{1}{7}$=	3-$\frac{3}{5}$=	$\frac{1}{5}$÷$\frac{3}{5}$=	$\frac{5}{6}$×$\frac{9}{10}$=

Answer 1

分析 根據(jù)小數(shù)加法、小數(shù)減法、分?jǐn)?shù)加法、分?jǐn)?shù)減法、分?jǐn)?shù)乘法、分?jǐn)?shù)乘法的計算法則，依次進(jìn)行計算即可．

解答 解：

1÷$\frac{4}{9}$=$\frac{9}{4}$	$\frac{3}{4}$×$\frac{5}{9}$=$\frac{5}{12}$	$\frac{2}{3}$+$\frac{1}{4}$=$\frac{11}{12}$	5-1.4-1.6=2	$\frac{11}{12}$÷22=$\frac{1}{24}$
1.4-0.6=0.8	$\frac{7}{8}$×$\frac{1}{7}$=$\frac{1}{8}$	3-$\frac{3}{5}$=2.4	$\frac{1}{5}$÷$\frac{3}{5}$=$\frac{1}{3}$	$\frac{5}{6}$×$\frac{9}{10}$=$\frac{3}{4}$

點(diǎn)評 明確小數(shù)加法、小數(shù)減法、分?jǐn)?shù)加法、分?jǐn)?shù)減法、分?jǐn)?shù)乘法、分?jǐn)?shù)乘法的計算法則，是解答此題的關(guān)鍵．