在数轴上表示下列各数。每个例子都画一条单独的数轴。
(1) $\frac{3}{2}, \frac{5}{2},-\frac{3}{2}$。
(2) $\frac{7}{5}, \frac{-2}{5}, \frac{-4}{5}$。
(3) $\frac{-5}{8}, \frac{11}{8}$。
(4) $\frac{13}{10}, \frac{-17}{10}$。
已知
给定的数集是:
(1) $\frac{3}{2}, \frac{5}{2},-\frac{3}{2}$。
(2) $\frac{7}{5}, \frac{-2}{5}, \frac{-4}{5}$。
(3) $\frac{-5}{8}, \frac{11}{8}$。
(4) $\frac{13}{10}, \frac{-17}{10}$。
要求
我们必须在数轴上表示给定的数。
解答
(1) $\frac{3}{2}, \frac{5}{2},-\frac{3}{2}$。
$\frac{3}{2}, \frac{5}{2},-\frac{3}{2}$ 可以在数轴上表示如下。
$\frac{3}{2} = 1 \frac{1}{2}$
$\frac{5}{2}= 2 \frac{1}{2}$
$-\frac{3}{2} = -1 \frac{1}{2}$
(2) $\frac{7}{5}, \frac{-2}{5}, \frac{-4}{5}$
$\frac{7}{5}, \frac{-2}{5}, \frac{-4}{5}$ 可以在数轴上表示如下:
所示。
$\frac{7}{5} = 1 \frac{2}{5}$
(3) $\frac{-5}{8}, \frac{11}{8}$
$\frac{-5}{8}, \frac{11}{8}$ 可以在数轴上表示如下。
$\frac{11}{8} = 1 \frac{3}{8}$
(4) $\frac{13}{10}, \frac{-17}{10}$。
$\frac{13}{10}, \frac{-17}{10}$ 可以在数轴上表示如下。
$\frac{13}{10} = 1 \frac{3}{10}$
$\frac{-17}{10} = -1 \frac{7}{10}$
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