第67页 - 亮点给力提优课时作业本五年级数学江苏版

$ \begin{aligned}&=\frac{15}{24}-\frac4{24}+\frac{16}{24} \\ &=\frac98 \\ \end{aligned}$

$ \begin{aligned}&=2-(\frac{12}{15}-\frac{10}{15}) \\ &=1\frac{13}{15} \\ \end{aligned}$

$ \begin{aligned}&=\frac{22}{24}-(\frac4{24}+\frac3{24}) \\ &=\frac58 \\ \end{aligned}$

$ \begin{aligned}&=\frac{14}{18}+\frac{15}{18}-\frac6{18} \\ &=\frac{23}{18} \\ \end{aligned}$

3

7

$\frac {47}{28}$

4

9

$\frac{19} {20}-\frac{1} {8}+\frac{19} {20} = \frac{71} {40}(吨)$

$答：这堆货物原有\frac {71}{40}吨。$

1

3

$\frac{4} {7}+\frac{4} {7}+\frac{2} {9} = \frac{86} {63}(米)$

$答：这个等腰三角形的周长是\frac {86}{63}米。$

水

$1−\frac{3} {8}-\frac{3} {8}=\frac{1} {4}\ $

$答：运往甲市的货物占了这堆货物的\frac {1}{4}。$