Convert Minutes to Hours | Year 4 Maths Resources

## KS2 SATs Flash Cards

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## What you need to know

Things to remember:

• 1 hour = 60 minutes
• Quarter of an hour is 15 minutes
• Half of an hour is 30 minutes
• Three quarters of an hour is 45 minutes.
• To divide by 60 we can divide by 10 and then 6, or the other way.

It is important to learn some simple conversions for time:

Quarter of an hour is 15 minutes

Half an hour is 30 minutes

Three quarters of an hour is 45 minutes

1 hour is 60 minutes

We have two ways of converting minutes into hours.

Method 1: Division

How many hours are in 240 minutes?

Because there are 60 minutes in an hour, when we turn minutes into hours we have to divide by 60.

$$240\div 60=4$$

Tip: This is tricky though, so we can do this in two easier steps:

Step 1: Divide by 10 to remove a zero.

$$240\div 10=24$$

Step 2: Divide by 6.

$$24\div6=4$$

So, we got the same answer of 4 hours.

What is 150 minutes in hours?

If we used Method 1 to divide we’d get a decimal, so let’s count up until we have too many minutes.

Hours 1 2 3 4 5 6

Minutes 60 120 180 240 300 360

If we count up, we can see that 3 hours is 180 minutes, which is too many. So, what do we do? We stop at 2 hours and see how many minutes we have left.

$$150 - 120 = 30$$

We have 30 minutes left, which we know is half an hour. So, in total, there are 2 and a half hours.

## Example Questions

Step 1: Divide by 10 to remove a zero.

$$540\div 10=54$$

Step 2: Divide by 6.

$$54\div6=9$$

So, 540 minutes is the same as 9 hours.

If we count up, we can see that 4 hours is 240 minutes, which is too many. We stop at 3 hours, 180 minutes, and see how many minutes we have left.

$$225 – 180 = 45$$

We have 45 minutes left, which we know is three quarters of an hour. So, in total, there are 3- and three-quarter hours.

## KS2 SATs Flash Cards

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