一、口算。
$0.05×20=$
$\frac{2}{5}÷\frac{4}{13}=$
$84×\frac{5}{7}=$
$0.6÷0.15=$
$\frac{9}{7}×\frac{2}{3}=$
$\frac{10}{21}÷\frac{2}{3}=$
$368+22=$
$\frac{7}{8}÷\frac{1}{12}=$
$\frac{3}{5}-\frac{3}{10}=$
$\frac{8}{15}÷4=$
$1.06×5=$
$1-0.72\%=$
$\frac{7}{8}÷\frac{5}{16}=$
$\frac{2}{5}-\frac{1}{8}=$
$\frac{2}{3}+\frac{2}{3}=$
$32×75\%=$
$0.75+0.375=$
$\frac{5}{8}÷\frac{4}{5}=$
$\frac{7}{12}×\frac{9}{14}=$
$20.8\%-8\%=$
$5.8+5.2=$
$0.05×20=$
1
$\frac{2}{5}÷\frac{4}{13}=$
$\frac{13}{10}$
$84×\frac{5}{7}=$
60
$0.6÷0.15=$
4
$\frac{9}{7}×\frac{2}{3}=$
$\frac{6}{7}$
$\frac{10}{21}÷\frac{2}{3}=$
$\frac{5}{7}$
$368+22=$
390
$\frac{7}{8}÷\frac{1}{12}=$
$\frac{21}{2}$
$\frac{3}{5}-\frac{3}{10}=$
$\frac{3}{10}$
$\frac{8}{15}÷4=$
$\frac{2}{15}$
$1.06×5=$
5.3
$1-0.72\%=$
0.9928
$\frac{7}{8}÷\frac{5}{16}=$
$\frac{14}{5}$
$\frac{2}{5}-\frac{1}{8}=$
$\frac{11}{40}$
$\frac{2}{3}+\frac{2}{3}=$
$\frac{4}{3}$
$32×75\%=$
24
$0.75+0.375=$
1.125
$\frac{5}{8}÷\frac{4}{5}=$
$\frac{25}{32}$
$\frac{7}{12}×\frac{9}{14}=$
$\frac{3}{8}$
$20.8\%-8\%=$
12.8%
$5.8+5.2=$
11
答案
一、1 $\frac{13}{10}$ 60
4 $\frac{6}{7}$ $\frac{5}{7}$
390 $\frac{21}{2}$ $\frac{3}{10}$
$\frac{2}{15}$ 5.3 0.9928
$\frac{14}{5}$ $\frac{11}{40}$ $\frac{4}{3}$
24 1.125 $\frac{25}{32}$
$\frac{3}{8}$ 12.8% 11
4 $\frac{6}{7}$ $\frac{5}{7}$
390 $\frac{21}{2}$ $\frac{3}{10}$
$\frac{2}{15}$ 5.3 0.9928
$\frac{14}{5}$ $\frac{11}{40}$ $\frac{4}{3}$
24 1.125 $\frac{25}{32}$
$\frac{3}{8}$ 12.8% 11
二、解比例。
$3:8=x:16$
$\frac{x}{7}=\frac{0.9}{21}$
$\frac{1}{20}:\frac{1}{5}=x:\frac{1}{4}$
$x:12=\frac{7}{4}:2.8$
$4:x=\frac{2}{11}$
$x:30=0.45:0.15$
$3:8=x:16$
$\frac{x}{7}=\frac{0.9}{21}$
$\frac{1}{20}:\frac{1}{5}=x:\frac{1}{4}$
$x:12=\frac{7}{4}:2.8$
$4:x=\frac{2}{11}$
$x:30=0.45:0.15$
答案
二、$x=6$ $x=0.3$ $x=\frac{1}{16}$
$x=7.5$ $x=22$ $x=90$
$x=7.5$ $x=22$ $x=90$
登录