We use number line to compare and order integers.

That is, if we want to compare two integers, first we have to locate the integers on the number line and mark them.

The integer which comes to the right of the other integer is greater. The integer which comes to the left of the other integer is smaller.

To order the integers, we have to locate the given integers on the number line and mark them. Then, write the integers from left to right to list them in order from least to greatest.

**Example 1 :**

Compare the integers -4 and 4

**Solution : **

Let us locate the two integers -4 and 4 on a number line and mark them.

Here, the positive integer 4 comes to the right of -4.

Therefore "4" is greater than "-4"

And -4 comes to the left of 4.

Therefore "-4" is smaller than "4"

**Example 2 :**

Compare the integers -1 and 1

**Solution : **

Let us locate the two integers -1 and 1 on a number line and mark them.

Here, the positive integer 1 comes to the right of -1.

Therefore "1" is greater than "-1"

And -1 comes to the left of 1.

Therefore "-1" is smaller than "1".

**Question :**

Order the integers -2, -5, 4, 0, -3, -1, 3 from least to greatest.

**Answer : **

Let us locate the integers -2, -5, 4, 0, -3, -1, 3 on a number line and mark them.

From the above number line, write the integers from left to right to list them in order from least to greatest.

Thus, we get

-5, -3, -2, -1, 0, 3, 4

**Problem 1 :**

In 2010, Sacramento, California, received 23 inches in annual precipitation. In 2011, the city received 17 inches in annual precipitation. In which year was there more precipitation ?

**Solution : **

Locate the two integers 23 and 17 on a number line and mark them.

23 is to the right of 17 on the number line.

This means that 23 is greater than 17.

We can write the above situation in terms of inequality as 23 > 17.

17 is to the left of 23 on the number line.

This means that 17 is less than 23.

We can write the above situation in terms of inequality as 17 < 23.

There was more precipitation in 2010.

**Problem 2 :**

John recorded the following golf scores during his first week at a golf academy. Negative numbers represent scores below par, a standard score. In golf, a lower score beats a higher score.

Graph John’s scores on the number line, and then list the numbers in order from least to greatest.

**Solution :**

**Step 1 :**

Graph the scores on the number line.

**Step 2 :**

Read from left to right to list the scores in order from least to greatest.

The scores listed from least to greatest are

–5, –3, –2, –1, 0, 3, 4.

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