Questions: 在數線上，絕對值等於 5.3 的數有 5.3, -5.3 。在 -3.2 、 5 、 2 3/4 、 0 、-2 、 1.8 、-1 3/8 、 6 八個數中 (1) 哪些為負數？答： (2) 哪些為正數？答：

Transcript text: (2) 在數線上，絕對值等於 5.3 的數有 $5.3,5.3$ 。在 $-3.2 、 5 、 2 \frac{3}{4} 、 0 、-2 、 1.8 、-1 \frac{3}{8} 、 6$ 八個數中 (1) 哪些為負數？答： $\qquad$ (2) 哪些為正數？答： $\qquad$

Solution

Solution Steps

Solution Approach

To determine which numbers are negative, we need to identify numbers less than zero from the given list.
To determine which numbers are positive, we need to identify numbers greater than zero from the given list.

Step 1: Identify Negative Numbers

To find the negative numbers from the list $[-3.2, 5, 2.75, 0, -2, 1.8, -1.375, 6]$, we select numbers that are less than zero. These numbers are: \[ -3.2, -2, -1.375 \]

Step 2: Identify Positive Numbers

To find the positive numbers from the list, we select numbers that are greater than zero. These numbers are: \[ 5, 2.75, 1.8, 6 \]