Page 124 - NUMINO Challenge_B1

Basic Concepts Measurable Volume

The process of measuring volume using different containers can be shown
using an equation. For example, measuring 7 L of water using two
containers with a capacity of 3 L and 5 L can be shown in the equation
7 5 3 5. The number being added is the amount of water that is poured
into a container. The number being subtracted is the amount of water that is
poured out of a container.

Fill up the 5-L container with water.
Pour the water in the 5-L container into the 3-L container. The 5-L
container will have 2 L of water left.
Empty the 3-L container. Then pour the 2 L of water in the 5-L container
into the 3-L container.
Fill up the 5-L container with water again. Now there is a total of 7 L of
water in both containers.

Example There are two empty 5-L and 6-L containers. Explain how you can
get 7 L of water using these two containers.

Class Notes

We can show an answer of 7 in an equation using 5, 6, (addition), and (subtraction):

7.

Fill up the 6-L container with water. Pour all Steps Amount of Water (L)
the water into the 5-L container. There is Start
5-L Container 6-L Container
L of water left in the 6-L container.
00

06

Empty the 5-L container. 0
Pour all the water in the 6-L container into
the 5-L container.
Fill up the 6-L container with water again.
The amount of water in both containers
measures 7 L altogether.

121Measurement