Question

6．直接寫(xiě)得數(shù)．

$\frac{2}{11}$×8=	$\frac{3}{5}$×2.5=	$\frac{1}{3}$-$\frac{1}{4}$=	1-$\frac{5}{7}$×$\frac{7}{9}$=
$\frac{3}{5}$×$\frac{1}{4}$=	$\frac{5}{6}$÷5=	$\frac{5}{6}$÷$\frac{5}{12}$=	$\frac{1}{2}$+$\frac{1}{2}$×$\frac{1}{3}$+$\frac{2}{3}$=

Answer 1

分析 根據(jù)分?jǐn)?shù)乘除法的計(jì)算方法計(jì)算．

解答 解：$\frac{2}{11}×8=\frac{16}{11}\\;\\;\\;\\;\\;\\;\frac{3}{5}×2.5=1.5\\;\\;\\;\\;\\;\frac{1}{3}-\frac{1}{4}=\frac{1}{12}$   $\frac{3}{5}×2.5=1.5$   $\frac{1}{3}-\frac{1}{4}=\frac{1}{12}$     1-$\frac{5}{7}×\frac{7}{9}=\frac{4}{9}$
$\frac{3}{5}×\frac{1}{4}=\frac{3}{20}$       $\frac{5}{6}÷5=\frac{1}{6}$       $\frac{5}{6}÷\frac{5}{12}=2$     $\frac{1}{2}+\frac{1}{2}×\frac{1}{3}+\frac{2}{3}=\frac{4}{3}$

點(diǎn)評(píng) 口算題要認(rèn)真看準(zhǔn)數(shù)和運(yùn)算符號(hào)，計(jì)算要認(rèn)真．