《2025年云南师大附小一线名师核心试卷三年级数学上册人教版》

四、口算。(8 分)
$\dfrac{2}{5}+\dfrac{2}{5}=$$\frac{4}{5}$ $1-\dfrac{1}{3}=$$\frac{2}{3}$ $\dfrac{7}{8}-\dfrac{2}{8}=$$\frac{5}{8}$ $\dfrac{3}{9}+\dfrac{6}{9}=$1
$\dfrac{2}{5}+\dfrac{1}{5}+\dfrac{2}{5}=$1 $1-\dfrac{1}{6}-\dfrac{2}{6}=$$\frac{3}{6}$ $\dfrac{5}{6}-\dfrac{3}{6}+\dfrac{2}{6}=$$\frac{4}{6}$ $\dfrac{7}{9}+\dfrac{1}{9}-\dfrac{5}{9}=$$\frac{3}{9}$

答案： $\frac{4}{5}$ $\frac{2}{3}$ $\frac{5}{8}$ 1 1 $\frac{3}{6}$ $\frac{4}{6}$ $\frac{3}{9}$

五、在表格里填上合适的分数。(8 分)

$\frac{2}{4}$ $\frac{3}{8}$ $\frac{8}{16}$ $\frac{3}{9}$ $\frac{2}{4}$ $\frac{5}{8}$ $\frac{8}{16}$ $\frac{6}{9}$

答案： $\frac{2}{4}$ $\frac{3}{8}$ $\frac{8}{16}$ $\frac{3}{9}$ $\frac{2}{4}$ $\frac{5}{8}$ $\frac{8}{16}$ $\frac{6}{9}$

六、看图列式计算。(8 分)
$\dfrac{1}{4}$ $\dfrac{2}{4}$
$\dfrac{3}{9}$ $\dfrac{4}{9}$

答案： $1-(\frac{1}{4}+\frac{2}{4})=\frac{1}{4}$ $\frac{3}{9}+\frac{4}{9}=\frac{7}{9}$