三、在$◯$里填上“>”“<”或“=”。
$\frac {1}{6}+\frac {5}{6}$
$\frac {7}{12}-\frac {5}{12}$
$\frac {3}{8}+\frac {1}{8}$
$\frac {11}{18}-\frac {5}{18}$
$\frac {5}{12}+\frac {7}{12}-\frac {1}{12}$
$\frac {7}{15}+\frac {1}{15}+\frac {14}{15}$
$\frac {1}{6}+\frac {5}{6}$
>
$\frac {5}{6}$$\frac {7}{12}-\frac {5}{12}$
>
$\frac {1}{12}$$\frac {3}{8}+\frac {1}{8}$
=
$\frac {2}{6}+\frac {1}{6}$$\frac {11}{18}-\frac {5}{18}$
<
$\frac {5}{6}-\frac {1}{6}$$\frac {5}{12}+\frac {7}{12}-\frac {1}{12}$
>
$\frac {3}{8}+\frac {1}{8}+\frac {2}{8}$$\frac {7}{15}+\frac {1}{15}+\frac {14}{15}$
>
$1-\frac {11}{20}-\frac {1}{20}$
答案:
> > = < > >
四、计算下列各题,能简算的要简算。
$\frac {8}{15}-\frac {2}{15}-\frac {1}{15}$
$\frac {11}{45}+\frac {17}{45}+\frac {11}{45}$
$\frac {4}{15}+\frac {1}{5}+\frac {11}{15}+\frac {4}{5}$
$\frac {7}{12}+\frac {1}{4}-\frac {5}{12}+\frac {3}{4}$
$\frac {8}{15}-\frac {2}{15}-\frac {1}{15}$
$\frac {11}{45}+\frac {17}{45}+\frac {11}{45}$
$\frac {4}{15}+\frac {1}{5}+\frac {11}{15}+\frac {4}{5}$
$\frac {7}{12}+\frac {1}{4}-\frac {5}{12}+\frac {3}{4}$
答案:
$\frac{1}{3}$ $\frac{13}{15}$ 2 $1\frac{1}{6}$
五、列式计算。
1. 5 个$\frac {1}{9}$加上 4 个$\frac {1}{9}$和是多少?
2. 比$\frac {11}{13}与\frac {2}{13}的差多\frac {4}{13}$的数是多少?
1. 5 个$\frac {1}{9}$加上 4 个$\frac {1}{9}$和是多少?
2. 比$\frac {11}{13}与\frac {2}{13}的差多\frac {4}{13}$的数是多少?
答案:
1. 1(列式略) 2. 1(列式略)
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