Comparing Integers, Sort Integers,Against a Number and Addition Operations on Integers

D. Comparing Integers

Of course, you still remember this symbol.

< : the smaller than symbol.

> : the greater than symbol.

= : the equals symbol

Take a look at the number line on page 145!

- Number 3 is to the right of number 2, meaning: 3 > 2 or 2 < 3.

- Number 5 is to the right of number 1 means: 5 > 1 or 1 < 5.

- The number –2 is to the left of the number –1, means: –1 > –2 or –2 < –1.

E. Sort Integers

Previously, it was explained that on the integer line, the greater the value to the right and the smaller the value to the left.

To sort numbers, the numbers to be sorted are placed on the number line. The number on the far right has the greatest value and the number on the far left has the smallest value

F. Against a Number

To understand the opposite of a number, consider the following! Andi and Herman stand at point A.

To the left the opponent is to the right. If to the left we put a negative sign (–), then to the right we put a positive sign.

So, –4 versus 4.

In the same way, then:

5 against –5

7 against –7

–8 versus 8

–12 versus 12 and so on.

G. Addition Operations on Integers

The number line can be used as a tool to solve additions to integers. Terms that must be understood as follows.

1. Addition with positive numbers means the direction of the arrow is to the right.

2. Addition with negative numbers, means the direction of the arrow to the left.

3. The base of the arrow starts from zero.

H. Subtraction Operations on Integers

The subtraction operation is the opposite of the addition operation.

Take a look at the following examples!

6 – 2 = 6 + (–2)

6 minus 2 is equal to 6 plus the opposite of 2.