1.每日速算。
5.85+1.15=
8.32-0.2=
0.11×0.9=
2.8÷0.01=
$\frac{1}{2}+\frac{3}{10}=$
$1\frac{1}{2}-\frac{7}{10}=$
$\frac{4}{9}+\frac{1}{7}+\frac{5}{9}=$
$1-\frac{1}{4}-\frac{1}{5}=$
5.85+1.15=
8.32-0.2=
0.11×0.9=
2.8÷0.01=
$\frac{1}{2}+\frac{3}{10}=$
$1\frac{1}{2}-\frac{7}{10}=$
$\frac{4}{9}+\frac{1}{7}+\frac{5}{9}=$
$1-\frac{1}{4}-\frac{1}{5}=$
答案
5.85+1.15=7
8.32-0.2=8.12
0.11×0.9=0.099
2.8÷0.01=280
$\frac{1}{2}+\frac{3}{10}=\frac{4}{5}$
$1\frac{1}{2}-\frac{7}{10}=\frac{4}{5}$
$\frac{4}{9}+\frac{1}{7}+\frac{5}{9}=1\frac{1}{7}$
$1-\frac{1}{4}-\frac{1}{5}=\frac{11}{20}$
8.32-0.2=8.12
0.11×0.9=0.099
2.8÷0.01=280
$\frac{1}{2}+\frac{3}{10}=\frac{4}{5}$
$1\frac{1}{2}-\frac{7}{10}=\frac{4}{5}$
$\frac{4}{9}+\frac{1}{7}+\frac{5}{9}=1\frac{1}{7}$
$1-\frac{1}{4}-\frac{1}{5}=\frac{11}{20}$
2.计算下面各题,能简便计算的要用简便方法计算。
$\frac{1}{3} - \frac{1}{4} + \frac{3}{5}$
$\frac{2}{3} + \frac{1}{6} - \frac{5}{18}$
$\frac{1}{6} + \frac{5}{12} + \frac{5}{6}$
$\frac{1}{2} - (\frac{1}{2} - \frac{1}{5})$
$1 - (\frac{1}{2} + \frac{1}{3})$
$\frac{5}{7} - \frac{1}{14} - \frac{3}{14}$
$\frac{1}{3} - \frac{1}{4} + \frac{3}{5}$
$\frac{2}{3} + \frac{1}{6} - \frac{5}{18}$
$\frac{1}{6} + \frac{5}{12} + \frac{5}{6}$
$\frac{1}{2} - (\frac{1}{2} - \frac{1}{5})$
$1 - (\frac{1}{2} + \frac{1}{3})$
$\frac{5}{7} - \frac{1}{14} - \frac{3}{14}$
答案
$\frac{1}{3} - \frac{1}{4} + \frac{3}{5}=\frac{41}{60}$
$\frac{2}{3} + \frac{1}{6} - \frac{5}{18}=\frac{5}{9}$
$\frac{1}{6} + \frac{5}{12} + \frac{5}{6}=1\frac{5}{12}$
$\frac{1}{2} - (\frac{1}{2} - \frac{1}{5})=\frac{1}{5}$
$1 - (\frac{1}{2} + \frac{1}{3})=\frac{1}{6}$
$\frac{5}{7} - \frac{1}{14} - \frac{3}{14}=\frac{3}{7}$
$\frac{2}{3} + \frac{1}{6} - \frac{5}{18}=\frac{5}{9}$
$\frac{1}{6} + \frac{5}{12} + \frac{5}{6}=1\frac{5}{12}$
$\frac{1}{2} - (\frac{1}{2} - \frac{1}{5})=\frac{1}{5}$
$1 - (\frac{1}{2} + \frac{1}{3})=\frac{1}{6}$
$\frac{5}{7} - \frac{1}{14} - \frac{3}{14}=\frac{3}{7}$
3.王师傅带领工人给安居小区铺设自来水管道。第一天铺了$\frac{4}{5}$千米,第二天铺了$\frac{13}{20}$千米,第三天铺了$\frac{2}{5}$千米。三天一共铺了多少千米?
答案
$1\frac{17}{20}$千米
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