1. 直接写出得数。(4分)
$\frac{2}{3} × \frac{2}{3} = $
$\frac{1}{2} ÷ 3 = $
$36 × \frac{4}{9} = $
$1 ÷ \frac{3}{2} × \frac{2}{3} = $
$\frac{3}{4} ÷ \frac{4}{9} = $
$\frac{2}{9} × \frac{12}{5} = $
$10 ÷ \frac{5}{7} = $
$0.25^3 = $
$\frac{2}{3} × \frac{2}{3} = $
$\frac{4}{9}$
$\frac{1}{2} ÷ 3 = $
$\frac{1}{6}$
$36 × \frac{4}{9} = $
16
$1 ÷ \frac{3}{2} × \frac{2}{3} = $
$\frac{4}{9}$
$\frac{3}{4} ÷ \frac{4}{9} = $
$\frac{27}{16}$
$\frac{2}{9} × \frac{12}{5} = $
$\frac{8}{15}$
$10 ÷ \frac{5}{7} = $
14
$0.25^3 = $
$\frac{1}{64}$
答案:
$\frac{4}{9}$ $\frac{1}{6}$ 16 $\frac{4}{9}$ $\frac{27}{16}$ $\frac{8}{15}$ 14 $\frac{1}{64}$
2. 计算下面各题,怎样算简便就怎样算。(18分)
$\frac{1}{2} - \frac{3}{8} ÷ \frac{5}{4} × \frac{5}{6}$
$\frac{5}{8} × \frac{1}{9} + \frac{3}{8} ÷ 9$
$\frac{8}{9} ÷ \left[ \frac{4}{3} × \left( \frac{2}{5} + \frac{1}{10} \right) \right]$
$\left( \frac{1}{2} + \frac{1}{3} - \frac{1}{4} \right) × 12$
$89 × \frac{83}{88} - 83 ÷ 88$
$\frac{8}{9} × \left[ \frac{3}{7} ÷ \left( \frac{2}{3} + \frac{1}{7} \right) \right]$
$\frac{1}{2} - \frac{3}{8} ÷ \frac{5}{4} × \frac{5}{6}$
$\frac{5}{8} × \frac{1}{9} + \frac{3}{8} ÷ 9$
$\frac{8}{9} ÷ \left[ \frac{4}{3} × \left( \frac{2}{5} + \frac{1}{10} \right) \right]$
$\left( \frac{1}{2} + \frac{1}{3} - \frac{1}{4} \right) × 12$
$89 × \frac{83}{88} - 83 ÷ 88$
$\frac{8}{9} × \left[ \frac{3}{7} ÷ \left( \frac{2}{3} + \frac{1}{7} \right) \right]$
答案:
$\frac{1}{4}$ $\frac{1}{9}$ $\frac{4}{3}$ 7 83 $\frac{8}{17}$
3. 化简比,并求比值。(8分)
$\frac{3}{5} : 0.125$
$25 : 0.75$
$\frac{3}{4}$时:12分
$0.8$公顷:$\frac{1}{2}$平方千米
$\frac{3}{5} : 0.125$
$25 : 0.75$
$\frac{3}{4}$时:12分
$0.8$公顷:$\frac{1}{2}$平方千米
答案:
24:5 $\frac{24}{5}$ 100:3 $\frac{100}{3}$ 15:4 $\frac{15}{4}$ 2:125 $\frac{2}{125}$
1. (
9
):15= 0.6= (6
)÷10= $\frac{36}{(60
)}$= (60
)%= (六
)折
答案:
9 6 60 60 六
查看更多完整答案,请扫码查看