1.直接写出得数。（每题1★）
$\frac{6}{13}-\frac{2}{13}=$
$\frac{5}{12}-\frac{1}{4}=$
$1-\frac{3}{10}=$
$\frac{5}{9}-\frac{1}{3}=$
$\frac{5}{6}+\frac{1}{3}=$
$\frac{2}{7}+2=$
$\frac{1}{4}+\frac{1}{2}=$
$1-\frac{9}{14}=$
$\frac{4}{5}-\frac{4}{5}=$
$\frac{1}{2}-\frac{1}{10}=$
$\frac{7}{11}+\frac{4}{11}=$
$\frac{11}{9}-1=$
$\frac{5}{6}-\frac{2}{3}=$
$0.25-\frac{1}{4}=$
$\frac{1}{3}+\frac{1}{8}=$
$7-\frac{5}{3}=$
$\frac{7}{8}-\frac{3}{4}=$
$\frac{4}{9}+\frac{8}{9}=$
$\frac{4}{5}-\frac{3}{10}=$
$1-\frac{2}{5}-\frac{3}{5}=$

1.$\frac{4}{13}$ $\frac{1}{6}$ $\frac{7}{10}$ $\frac{2}{9}$
$\frac{7}{6}$ $2\frac{2}{7}$ $\frac{3}{4}$ $\frac{5}{14}$
0 $\frac{2}{5}$ 1 $\frac{2}{9}$
$\frac{1}{6}$ 0 $\frac{11}{24}$ $5\frac{1}{3}$
$\frac{1}{8}$ $\frac{4}{3}$ $\frac{1}{2}$ 0

2.计算下面各题,能简算的要简算。(每题3★)
$\frac{2}{7}+\frac{2}{3}+\frac{5}{7}$
$1-(\frac{3}{10}-\frac{1}{6})$
$\frac{4}{15}+\frac{7}{10}+\frac{4}{15}+\frac{3}{10}$
$\frac{10}{11}+(\frac{1}{11}+\frac{2}{5})$
$\frac{17}{16}-(\frac{1}{4}+\frac{3}{8})$
$\frac{13}{24}+\frac{2}{3}-\frac{5}{6}$
$13-\frac{5}{13}-\frac{8}{13}$
$\frac{14}{9}-\frac{7}{11}+\frac{4}{9}-\frac{4}{11}$
$0.75+\frac{10}{17}+\frac{1}{4}+\frac{7}{17}$

2.$1\frac{2}{3}$ $\frac{13}{15}$ $1\frac{8}{15}$
$1\frac{2}{5}$ $\frac{7}{16}$ $\frac{3}{8}$
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