第40页 - 江苏版实验班提优训练数学六年级上下册答案

1.17

$\frac{1}{2}$

$\frac{21}{10}$

$\frac{4}{3}$

$\frac{5}{12}$

5

4

10

1.6

7

4

$ \begin{aligned}解：3x&=24×8 \\ x&=8×8 \\ x&=64 \\ \end{aligned}$

$ \begin{aligned}解：4.8x&=2×1.6 \\ 4.8x&=3.2 \\ x&=\frac{2}{3} \\ \end{aligned}$

$ \begin{aligned}解：0.6x&=1.5×16 \\ x&=1.5×16÷0.6 \\ x&=40 \\ \end{aligned}$

$ \begin{aligned}解：5:8&=40: x \\ x&=64 \\ \end{aligned}$

$ \begin{aligned}解：2:9&=\frac{3}{5}: x \\ x&=2.7 \\ \end{aligned}$

$ \begin{aligned}解：x: \frac{3}{4}&=\frac{1}{5}:\frac{2}{5} \\ x&=\frac{3}{8} \\ \end{aligned}$

$ \begin{aligned} 解：x: 2&=5:2.5 \\ 或2.5: 2&=5:x \\ x&=4 \\ \end{aligned}$

$解：设篮球场的宽是x米。$

$ \begin{aligned} 116:29&=70: x \\ x&=17.5 \\ \end{aligned}$

$答：篮球场的宽是17.5米。$

$ \begin{aligned} 解：\frac{5}{12}x&=\frac34×\frac23 \\ \frac{5}{12}x&=\frac12 \\ x&=\frac12÷\frac{5}{12} \\ x&=\frac{6}{5} \\ \end{aligned}$