1. 直接写出得数。
$\frac{1}{7}+\frac{2}{7}=$
$\frac{1}{4}+\frac{3}{4}=$
$\frac{9}{10}-\frac{8}{10}=$
$\frac{4}{11}-\frac{1}{11}=$
$\frac{3}{8}+\frac{3}{8}=$
$\frac{3}{6}+\frac{3}{6}=$
$\frac{6}{8}-\frac{4}{8}=$
$\frac{1}{7}+\frac{1}{7}=$
$\frac{5}{6}-\frac{3}{6}=$
$\frac{6}{8}-\frac{6}{8}=$
$\frac{7}{7}-\frac{1}{7}=$
$\frac{6}{12}+\frac{4}{12}=$
$\frac{9}{9}-\frac{7}{9}=$
$\frac{1}{7}+\frac{4}{7}=$
$\frac{1}{3}+\frac{2}{3}=$
$\frac{3}{8}+\frac{4}{8}=$
$\frac{5}{9}-\frac{2}{9}=$
$\frac{3}{9}+\frac{5}{9}=$
$\frac{2}{4}-\frac{2}{4}=$
$\frac{3}{7}+\frac{3}{7}=$
$\frac{7}{10}-\frac{1}{10}=$
$\frac{7}{10}-\frac{3}{10}=$
$\frac{9}{10}-\frac{4}{10}=$
$\frac{7}{9}+\frac{1}{9}=$
$\frac{1}{7}+\frac{2}{7}=$
$\frac{1}{4}+\frac{3}{4}=$
$\frac{9}{10}-\frac{8}{10}=$
$\frac{4}{11}-\frac{1}{11}=$
$\frac{3}{8}+\frac{3}{8}=$
$\frac{3}{6}+\frac{3}{6}=$
$\frac{6}{8}-\frac{4}{8}=$
$\frac{1}{7}+\frac{1}{7}=$
$\frac{5}{6}-\frac{3}{6}=$
$\frac{6}{8}-\frac{6}{8}=$
$\frac{7}{7}-\frac{1}{7}=$
$\frac{6}{12}+\frac{4}{12}=$
$\frac{9}{9}-\frac{7}{9}=$
$\frac{1}{7}+\frac{4}{7}=$
$\frac{1}{3}+\frac{2}{3}=$
$\frac{3}{8}+\frac{4}{8}=$
$\frac{5}{9}-\frac{2}{9}=$
$\frac{3}{9}+\frac{5}{9}=$
$\frac{2}{4}-\frac{2}{4}=$
$\frac{3}{7}+\frac{3}{7}=$
$\frac{7}{10}-\frac{1}{10}=$
$\frac{7}{10}-\frac{3}{10}=$
$\frac{9}{10}-\frac{4}{10}=$
$\frac{7}{9}+\frac{1}{9}=$
答案
1. $\dfrac{3}{7}$ $\dfrac{4}{4}$(或1) $\dfrac{1}{10}$ $\dfrac{3}{11}$
$\dfrac{6}{8}$ $\dfrac{6}{6}$(或1) $\dfrac{2}{8}$ $\dfrac{2}{7}$
$\dfrac{2}{6}$ 0 $\dfrac{6}{7}$ $\dfrac{10}{12}$
$\dfrac{2}{9}$ $\dfrac{5}{7}$ $\dfrac{3}{3}$(或1) $\dfrac{7}{8}$
$\dfrac{3}{9}$ $\dfrac{8}{9}$ 0 $\dfrac{6}{7}$
$\dfrac{6}{10}$ $\dfrac{4}{10}$ $\dfrac{5}{10}$ $\dfrac{8}{9}$
$\dfrac{6}{8}$ $\dfrac{6}{6}$(或1) $\dfrac{2}{8}$ $\dfrac{2}{7}$
$\dfrac{2}{6}$ 0 $\dfrac{6}{7}$ $\dfrac{10}{12}$
$\dfrac{2}{9}$ $\dfrac{5}{7}$ $\dfrac{3}{3}$(或1) $\dfrac{7}{8}$
$\dfrac{3}{9}$ $\dfrac{8}{9}$ 0 $\dfrac{6}{7}$
$\dfrac{6}{10}$ $\dfrac{4}{10}$ $\dfrac{5}{10}$ $\dfrac{8}{9}$
2. 用竖式计算。
$36×41=$
$55×46=$
$28×92=$
$52×61=$
$36×47=$
$63×27=$
$36×41=$
$55×46=$
$28×92=$
$52×61=$
$36×47=$
$63×27=$
答案
2. 1476 2530 2576
3172 1692 1701
竖式略
3172 1692 1701
竖式略
将$\frac{1}{15},\frac{1}{8},\frac{1}{6},\frac{1}{2},\frac{1}{10},\frac{1}{4}$按从大到小的顺序排列。
(
(
$\dfrac{1}{2}$
)>($\dfrac{1}{4}$
)>($\dfrac{1}{6}$
)>($\dfrac{1}{8}$
)>($\dfrac{1}{10}$
)>($\dfrac{1}{15}$
)答案
思维提升
$\dfrac{1}{2}$ $\dfrac{1}{4}$ $\dfrac{1}{6}$ $\dfrac{1}{8}$ $\dfrac{1}{10}$ $\dfrac{1}{15}$
$\dfrac{1}{2}$ $\dfrac{1}{4}$ $\dfrac{1}{6}$ $\dfrac{1}{8}$ $\dfrac{1}{10}$ $\dfrac{1}{15}$
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