1. 看图计算。

答案
2. $\frac{4}{7}-\frac{3}{7}=\frac{\square}{\square}$ $\frac{7}{10}-\frac{4}{10}=\frac{\square}{\square}$ $\frac{8}{11}-\frac{\square}{11}=\frac{\square}{11}$
答案
3. 根据分数加法算式,写出相应的减法算式。
$\frac{2}{7}+\frac{3}{7}=\frac{5}{7}$ $\frac{1}{9}+\frac{5}{9}=\frac{6}{9}$
$\frac{\square}{\square}-\frac{\square}{\square}=\frac{\square}{\square}$ $\frac{\square}{\square}-\frac{\square}{\square}=\frac{\square}{\square}$
$\frac{\square}{\square}-\frac{\square}{\square}=\frac{\square}{\square}$ $\frac{\square}{\square}-\frac{\square}{\square}=\frac{\square}{\square}$
$\frac{2}{7}+\frac{3}{7}=\frac{5}{7}$ $\frac{1}{9}+\frac{5}{9}=\frac{6}{9}$
$\frac{\square}{\square}-\frac{\square}{\square}=\frac{\square}{\square}$ $\frac{\square}{\square}-\frac{\square}{\square}=\frac{\square}{\square}$
$\frac{\square}{\square}-\frac{\square}{\square}=\frac{\square}{\square}$ $\frac{\square}{\square}-\frac{\square}{\square}=\frac{\square}{\square}$
答案
4. 在$\square$里填数。
$\frac{4}{7}-\frac{1}{7}=\frac{\square}{7}$ $\frac{\square}{11}-\frac{1}{11}=\frac{3}{11}$
$\frac{4}{9}-\frac{\square}{9}=\frac{3}{9}$ $\frac{\square}{5}-\frac{\square}{5}=\frac{3}{5}$
$\frac{4}{7}-\frac{1}{7}=\frac{\square}{7}$ $\frac{\square}{11}-\frac{1}{11}=\frac{3}{11}$
$\frac{4}{9}-\frac{\square}{9}=\frac{3}{9}$ $\frac{\square}{5}-\frac{\square}{5}=\frac{3}{5}$
答案
5. 在下图中涂色表示相应的分数,并写出分数加法或减法算式。

$\frac{\square}{7}+\frac{\square}{7}=\frac{\square}{7}$ $\frac{\square}{7}-\frac{\square}{7}=\frac{\square}{7}$
$\frac{\square}{7}+\frac{\square}{7}=\frac{\square}{7}$ $\frac{\square}{7}-\frac{\square}{7}=\frac{\square}{7}$
答案
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