1. 直接写出得数。(8分)
$\frac{2}{5} + \frac{3}{5} =$
$\frac{5}{6} - \frac{4}{6} =$
$\frac{9}{14} - \frac{3}{14} =$
$\frac{3}{11} + \frac{5}{11} =$
$\frac{17}{30} - \frac{8}{30} =$
$\frac{29}{72} + \frac{16}{72} =$
$\frac{90}{300} + \frac{40}{300} =$
$1 - \frac{1}{102} =$
$\frac{2}{5} + \frac{3}{5} =$
$\frac{5}{6} - \frac{4}{6} =$
$\frac{9}{14} - \frac{3}{14} =$
$\frac{3}{11} + \frac{5}{11} =$
$\frac{17}{30} - \frac{8}{30} =$
$\frac{29}{72} + \frac{16}{72} =$
$\frac{90}{300} + \frac{40}{300} =$
$1 - \frac{1}{102} =$
答案
1. $1\quad \frac{1}{6}\quad \frac{6}{14}\quad \frac{8}{11}\quad \frac{9}{30}\quad \frac{45}{72}\quad \frac{130}{300}\quad \frac{101}{102}$
2. 在(
$(\ )+\frac{5}{8}=\frac{7}{8}$
$\frac{9}{10}-(\ )=\frac{4}{10}$
$1-(\ )=\frac{3}{7}$
$\frac{2}{9}+\frac{(\ \ \ \ )}{9}=\frac{4}{9}+\frac{3}{9}$
$\frac{3}{14}+\frac{(\ \ \ \ )}{(\ \ \ \ )}=\frac{1}{6}+\frac{5}{6}$
$\frac{6}{11}-(\ )+\frac{2}{11}=\frac{4}{11}$
$\frac{2}{8}$
)里填上合适的数。(6分)$(\ )+\frac{5}{8}=\frac{7}{8}$
$\frac{9}{10}-(\ )=\frac{4}{10}$
$1-(\ )=\frac{3}{7}$
$\frac{2}{9}+\frac{(\ \ \ \ )}{9}=\frac{4}{9}+\frac{3}{9}$
$\frac{3}{14}+\frac{(\ \ \ \ )}{(\ \ \ \ )}=\frac{1}{6}+\frac{5}{6}$
$\frac{6}{11}-(\ )+\frac{2}{11}=\frac{4}{11}$
答案
2. $\frac{2}{8}\quad \frac{5}{10}\quad \frac{4}{7}\quad 5\quad \frac{11}{14}\quad \frac{4}{11}$
3. 在○里填上“>”“<”或“=”。(4分)
$1-\frac{3}{4} ◯ \frac{1}{8}$
$\frac{1}{4}+\frac{3}{4} ◯ \frac{4}{4}$
$\frac{7}{9}-\frac{5}{9} ◯ \frac{8}{9}-\frac{1}{9}$
$\frac{1}{5}+\frac{3}{5} ◯ \frac{4}{5}$
$1-\frac{3}{4} ◯ \frac{1}{8}$
$\frac{1}{4}+\frac{3}{4} ◯ \frac{4}{4}$
$\frac{7}{9}-\frac{5}{9} ◯ \frac{8}{9}-\frac{1}{9}$
$\frac{1}{5}+\frac{3}{5} ◯ \frac{4}{5}$
答案
3. $>\quad =\quad <\quad =$
4. 计算。(12分)
$\frac{2}{10}+\frac{3}{10}+\frac{4}{10}$
$1-\frac{2}{7}-\frac{3}{7}$
$1-(\frac{1}{8}+\frac{5}{8})$
$\frac{5}{12}+\frac{7}{12}-\frac{1}{4}$
$\frac{6}{20}+\frac{8}{20}-\frac{5}{20}$
$\frac{10}{13}-\frac{4}{13}+\frac{5}{13}$
$\frac{2}{10}+\frac{3}{10}+\frac{4}{10}$
$1-\frac{2}{7}-\frac{3}{7}$
$1-(\frac{1}{8}+\frac{5}{8})$
$\frac{5}{12}+\frac{7}{12}-\frac{1}{4}$
$\frac{6}{20}+\frac{8}{20}-\frac{5}{20}$
$\frac{10}{13}-\frac{4}{13}+\frac{5}{13}$
答案
4. $\frac{9}{10}\quad \frac{2}{7}\quad \frac{2}{8}\quad \frac{3}{4}\quad \frac{9}{20}\quad \frac{11}{13}$
1. 填空。(26分)
(1)涂色部分占整体的几分之几?(2分)

( 或 ) ( 或 或 )
(1)涂色部分占整体的几分之几?(2分)
( 或 ) ( 或 或 )
答案
(1) $\frac{3}{4},\frac{6}{8}\quad \frac{2}{3},\frac{4}{6},\frac{8}{12}$
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