1.2.2a Fractions
1. Positive fractions are fractions with the positive sign (+), and their values are greater than 0.
2. Negative fractions are fractions with the negative sign (–), and their values are less than 0.![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/06/Picture1.png)
1.2.2b Decimals
1. There are positive decimals and negative decimals.
2. Positive decimals are greater than zero and negative decimals are less than zero.![](http://pt3mathematics.blog.onlinetuition.com.my/wp-content/uploads/sites/6/2017/06/Picture2-1.png)
1.2.2c Rational Numbers
1. All integers are rational numbers.
2.The computations of directed numbers is the same as that for whole numbers.
Example 2:
(a)
(b) [(–28) – (–4)] ÷ (–5.147 – 0.853)
Solution:
(a)
(b)
[(–28) – (–4)] ÷ (–5.147 – 0.853)
= [–28 + 4] ÷ (–6)
= (–24) ÷ (–6)
= 4