A bar model is a pictorial representation of a problem where bars are used to represent the known and unknown quantities.

The whole is all of something. It is complete.

A part is some but not all of something. It is an amount or section which, when combined with others, makes up the whole.

Volume is the amount of space that an object takes up. In this case, the specific amount of liquid in a container. It can be measured in ml.

Solve problems involving volume

Maths

In this unit pupils will become familiar with different weighing scales up to 1kg and with the tools to measure volume and capacity up to 1 litre. They will measure mass from zero above 1kg using whole kg and grams and measure volume from zero above 1 litre using whole litres and ml. In the future unit pupils will use knowledge of 1000 to explain common measure conversions and solve problems.

In the prior unit pupils used and compared standard units to estimate and measure length/height, mass, temperature, capacity to the nearest unit. In this unit pupils will use weighing scales up to 1kg and measuring tools for volume and capacity up to 1 litre. They will measure mass from 0 to above 1kg using whole kg and grams and measure volume from 0 to above 1 litre using whole litres and ml

Measures: mass and capacity

Look at the problem and bar models. Which bar model is an accurate representation of the problem?

Look at the bar model. Sophia has 230 ml of water in her jug and Jacob has 50 ml water in his cup. What volume of water do they have altogether?

10 identical cups have an equal volume of water in them. The total amount of water in the cups is 680 ml. What is the volume of water in each cup?

Look at the bar model. The volume of water in the bottle is half the volume of water in the ten cups. What is the volume of water in the bottle?

Look at the bar model. How much greater is the volume of water in the bottle (340 ml) when compared to the volume of water in the cup (68 ml)?

A jug holds 10 times more water than a cup. The volume of the water in the jug is 890 ml. What is the volume of water in the cup?

Look at the picture. Which jug contains a greater volume of water?

The 1 L 500 ml represents a part of the whole.

Look at this bar model. What does the 1 L 500 ml represent?

Match the calculations with their answers.

Find the total of 2 L 300 ml and 1 L 400 ml.

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