# Estimate, compare and calculate different measures

Introduced in the Year 4 curriculum as: "Estimate, compare and calculate different measures, including money in pounds and pence"

Often, we need to compare two different units of measure in order to solve a problem.

When we have two different units of measure we have to convert measures into the same unit so that we can complete our calculation successfully.

These units might be money, capacity, distance or mass and weight.

100p = £1

1000ml = 1L

100cm = 1m 1000m = 1km

1000g = 1kg

Look at these examples to understand how to solve measure problems using appropriate conversions.

Example 1:

Jessie walks 750m to Tom's house and then 2.5km to the park. How far does she travel altogether?

First, we can convert 750m to km so that we can add the two values together.

750m = 0.75km.

So, 2.5 km + 0.7km = 3.25km.

Example 2:

A can of paint holds 2L. Jenny uses 300ml. How much paint is left in millilitres?

2 litres is equivalent to 2000ml.

2000ml - 300ml = 1700ml.

Example 3:

Dean has 35p in his pocket and five times as much in his wallet. How much does he have altogether in pounds?

35p + (5 x 35p) = 35p + 175p = 210 pence

210 pence is equivalent to £2.10.