How To Add And Subtract Like Fractions (Within One Whole)

Hi, I'm Felicity, and today we're going.

To be looking at adding and subtracting like fractions. A like fraction refers to two fractions in an equation that have the same denominator.

For example, we have 1/4 plus 2/4.

So each whole has been divided into four equal parts.

As the denominator is the same, we.

Always keep this the same when we're finding our total.

So we only add the numerator. It's really important that we are careful.

To see that children are not adding the denominator and creating eight and turning the fraction into eights.

So Here we add 1 to 2 to create 3/4.

Let's look at a pictorial example. So here in this addition example, you.

Can see I've indicated two sixths.

So two sections of the original whole.

Are shaded in adding this to 3, 6.

So these are like fractions because the denominator is the same.

So we add two to three to.

Find five and we keep the denominator the same.

So we've got 5, 6.

Subtraction works in exactly the same way. So here I've got a bar model.

That'S been divided into five equal parts, or fifths. I've shaded in four of those, so that's four fifths. But if I were to subtract three fifths, You can see quite clearly that.

We'Re left with 1/5. Another way of working with addition and subtraction of like fractions is to use a number line. So here, on this number line, I've divided it into eight equal sections.

If we were to start on 4, 8 and add 3, 8, we would simply need to jump forward three places.

On the number line, which would leave us on 7/8. Subtraction works in exactly the same way.

So this time let's take away 3/8 and jump back 3 places.

This will quite clearly leave us on 1,8.

These are just some ways we can.

Help our pupils to understand the addition and subtraction of like fractions.