Question

17．直接寫得數(shù)．
$\frac{7}{4}$×$\frac{1}{3}$=6×$\frac{5}{18}$=$\frac{5}{6}$×$\frac{5}{12}$=$\frac{3}{4}$×$\frac{10}{3}$=$\frac{5}{9}$×2.7=

$\frac{13}{11}$×$\frac{11}{13}$=$\frac{1}{3}$×$\frac{1}{5}$=$\frac{4}{7}$×$\frac{6}{5}$=3.6×$\frac{5}{6}$=0×$\frac{4}{23}$=

Answer 1

分析 根據(jù)分?jǐn)?shù)乘法的計(jì)算法則，依次進(jìn)行計(jì)算即可．

解答 解：
$\frac{7}{4}$×$\frac{1}{3}$=$\frac{7}{12}$      6×$\frac{5}{18}$=$\frac{5}{3}$    $\frac{5}{6}$×$\frac{5}{12}$=$\frac{25}{72}$     $\frac{3}{4}$×$\frac{10}{3}$=$\frac{5}{2}$           $\frac{5}{9}$×2.7=1.5

$\frac{13}{11}$×$\frac{11}{13}$=1      $\frac{1}{3}$×$\frac{1}{5}$=$\frac{1}{15}$         $\frac{4}{7}$×$\frac{6}{5}$=$\frac{24}{35}$       3.6×$\frac{5}{6}$=3      0×$\frac{4}{23}$=0

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