零五网 › 全部参考答案› 实验班提优训练答案 › 江苏版实验班提优训练数学六年级上下册答案 › 第30页

第30页

信息发布者：

10.2

$\frac{1}{6}$

1.4

$\frac{9}{2}$

$\frac{1}{24}$

300

0.008

$2\frac{2}{7}$

$ \begin {aligned} &=0.7×(1+99)\\&=0.7×100\\&=70 \end {aligned}$

$ \begin {aligned} &=4×0.25×1.2\\&=1×1.2\\&=1.2 \end {aligned}$

$ \begin {aligned}&=(1.3+8.7)-(\frac {1}{5}+\frac {9}{5})\\&=10-2\\&=8 \end {aligned}$

$ \begin {aligned} &=17×\frac {4}{3}-8×\frac {4}{3}\\&=(17-8)×\frac {4}{3}\\&=9×\frac {4}{3}\\&=12 \end {aligned}$

$ \begin {aligned}&=\frac {3}{4}×48-\frac {1}{6}×48+\frac {3}{8}×48\\&=36-8+18\\&=46 \end {aligned}$

$ \begin {aligned} &=\frac {9}{10}÷(\frac {9}{8}×\frac {2}{3})\\&=\frac {9}{10}÷\frac {3}{4}\\&=\frac {6}{5}\\&=1\frac {1}{5} \end {aligned}$

 解：

 $\begin{aligned} x+12.5\%x&=45\\ 1.125x&=45\\ x&=40 \end{aligned}$

 解：

 $\begin{aligned} \frac{4}{5}x÷\frac{2}{3}&=\frac{6}{7}\\ \frac{4}{5}x&=\frac{6}{7}×\frac{2}{3}\\ \frac{4}{5}x&=\frac{4}{7}\\ x&=\frac{5}{7} \end{aligned}$

 解：

 $\begin{aligned} \frac{3.5}{x}&=14:2\\ 14x&=3.5×2\\ 14x&=7\\ x&=0.5 \end{aligned}$