Question

86 - find the nolue of 5- 4 by using number line.​

Answer 1

Answer:

I. Steps on How to Add Numbers on the Number Line

As indicated in the diagram below:

To add a positive number means that we move the point to the right of the number line.

Similarly, to add a negative number implies that we move the point to the left of the number line.

here is a diagram of a number with zero at the center, integers 1 to 7 on the right side, and integers -1 to -7 on the left side. there are notes under the number line that to add a positive number, you move some units to the right of the number line while to add a negative number means you move some units to the left of the number line.

Examples of Adding Numbers on the Number Line

Example 1: Simplify by adding the numbers, 2 + 4.

The first step is to locate the first number which is two (2) on the number line.

the number two or 2 is represented as a dot on a number line

Adding four (4) means we have to move the point, four (4) units to the right.

the original number two is moved 4 units to the right of the number line to indicate addition

After doing so, we end up at 6. Therefore, 2+4=6.

Example 2: Simplify by adding the numbers, 3 + (–5).

Locate the first point, 3, on the number line.

the number three or 3 is represented as a dot on the number line. since +3 is positive, it is positioned at 3 units to the right of the center which is zero.

Now, we are going to add negative five (-5) which tells us to move the point 5 units going to the left.

the original positive 3 is moved 5 units to the left ending at negative two or -2 on the number line. this means that 5 is subtracted from positive three or +3. observe that when adding negative numbers, you move the number to the left.

We arrive at −2. That’s why 3 + (–5)=–2.

Example 3: Simplify by adding the numbers, –6 + 5.

Find where the first number, −6, is on the number line. To add five (5), the original point will be moved five (5) units to the right of the number line.

the original number six or -6 is added by 5 units. it means that -6 will move 5 units to the right of the number line which ends at number negative one or -1.

This gives us –6 + 5 = –1.