Volume

Volume

Metric units of volume are used to measure liquids and gases. Units of volume are like litres (l) and millilitres (ml). Use the chart of metric units of volume to remind yourself the relationship between metric units of volume from millilitres to litres.

Multiplication of metric units of volume

Multiply 23 l 200 ml by 7.

Solution

l ml 23 200 × 7

Steps:

1. Arrange units vertically from the smallest to the largest starting from right to left.
2. Consider the relationship between units of volume. 1 litre = 1,000 ml.
3. Multiply 200 ml by 7 to get 1,400 ml. Remember 1 litre = 1,000 ml. Therefore, 1,400 millilitres equal to 1 litre and 400 millilitres.
4. Write 400 ml in the millilitres column.
5. Multiply 23 litres by 7 to get 161 litres. Add 1 litre that remained in step 3 to 161 litres. That is, 161 litres + 1 litre = 162 litres.
6. Write 162 litres in the litres column.

l ml 23 200 × 7 162 400

Therefore, the answer is 162 litres 400 millilitres