### Key Concepts

Compare fractions: Use Benchmarks

Compare fractions: Use the Number Lines

Whole Numbers and Fractions

**Prior Knowledge:**

**Answer the following questions**

- How can we compare different fractions?

- How many thirds are there in 2 wholes?

- Use the number line to help order the fractions from least to greatest.

**Answers:**

- If the denominators are different and the numerators are the same, then we can easily compare fractions by looking at their denominators.

- We can use a number line or fraction strips to find a fraction name for two using thirds.

Here, from the figure we get, 2 = 6/3

∴ The whole number 2 can also be written as the fraction 6/3

- Given number line would be

Fractions from least to greatest are shown as below:

The fractions from least to greatest are 0/4, 6/8, 1/4, 1/2 and 1.

### Definition:

Benchmark fractions are common fractions that we compare with other fractions.

What benchmark fractions look like:

- Benchmark fractions are especially helpful on number lines

- The most famous number line used is a ruler
- Rulers use halves, fourths and eighths as benchmarks

#### Benchmark Fractions Chart:

Use the following benchmark chart for reference to compare fractions.

**Example:**

Keri wants to buy 2/6 of a container of roasted nuts. Alan wants to buy 2/3 of a container of roasted nuts. The containers are of the same size. Who will buy more nuts?

Comparing each fraction to the benchmark number 1/2

From the above figure, 2/6 is less than 2/3

Therefore,

2/3 is greater than 1/2.

Using symbols:

2/6 < 2/3.

**13.6 Compare Fractions: Use the Number Line **

### Fractions on a Number Line

Consider the whole shape, split the whole into 5 equal parts.

Select 1/5 part of the whole and represent on a number line.

Look at this number line. It starts at 0 and ends at 1, which represents the whole.

Do you notice how it is split into 5 parts?

That means our denominator must be 5. The numerators should go up in consecutive order.

What the fractions would look like when marked on the number line is:

Now we can easily compare the fractions.

**Note:**

A fraction is larger if it is farther from 0 on the number line

A fraction is smaller if it is closer to 0 on the number line

**Example:**

Compare the fractions 2/3 and 2/3 and 3/4 using <, >, or = with the help of number lines

First, draw a number line model for

2/3

Next, draw the number line model for

3/4. Place it under the number line model for 2/3.

Which fraction is farther from 0?

Here, 3/4 is farther from 0 than 2/3.

This means that 3/4 is greater than 2/3

∴ 3/ 4 > 2/3

**13.7 Whole Numbers and Fractions**

- Whole numbers are numbers that do not have fractions. Examples as 1, 2, and 10
- Every whole number can be written as a fraction too

**Writing Whole Numbers as Fractions:**

You can write any whole number into an equivalent fraction. Just divide it by 1.

Can we write the whole number 1 into a fraction?

Yes, we can write 1 into a fraction just by dividing 1 by 1, i.e., 1/1.

**Fractions Equivalent to Whole Numbers:**

If the numerator is divisible by the denominator, the fraction is equivalent to a whole number.

In other words, if you can divide the numerator by the denominator without any remainder, the fraction is equivalent to a whole number.

Consider the improper fraction 2/2

Is it equivalent to a whole number?

Yes, we can divide the numerator (2) by the denominator (2) without any remainder.

So 2/2 is equivalent to a whole number.

∴2/2 is equal to the whole number 1.

**Example:**

Write the equivalent fractions for the whole number 4. Use fraction strips to name whole numbers.

Here, we use fractions strips to name whole numbers.

Twelve 1/3 fraction strips are equal to 4 whole fraction strips.

All whole numbers have fraction names.

We can write 4 = 12/3

We also know 4 = 4/1

So, we write 4 = 4/1 = 12/3.

## Exercise:

- A mural is divided into 3 equal parts. What fraction represents the entire mural?
- A small cake is cut into 4 equal pieces. What fraction represents the entire cake?
- Write the equivalent fraction to the whole number 3.
- Compare with the help of a number line, which is greater
- Use fraction strips to compare
- Riley says the library is of a mile from their house. Sydney says it is of a mile. Use the number lines to find who is correct.
- Compare to the benchmark
- What fraction is equal to 65?
- What fraction is equal to 7?
- Mike had of a candy bar. Sally had of a candy bar. Whose fraction of a candy bar was closer to 1? Whose fraction of a candy bar was closer to 0?

### What we have learnt:

- Compare fractions by using concrete models
- Compare fractions by using benchmarks
- Order fractions by using concrete models, benchmarks and number lines
- Use symbols (>, <, =) to compare fractions with benchmarks and number lines
- Use representations to find fraction names for whole numbers