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A can of milk powder weighs 26.8kg. After pouring out half of the milk powder, it still weighs 14.4kg. How many kilograms can this milk weigh?
A can of milk powder weighs 26.8kg. After pouring out half of the milk powder, the can is still 14.4kg. How many kilograms is this milk can?

Ideas:

Half the difference between before and after milk powder.

Multiplied by 2, it is the weight of all milk powder.

The difference between the weight of cans and the weight of all milk powder is the weight of cans.

Solution:

26.8-(26.8- 14.4)*2=2 (kg)

This water tank weighs 2 kilograms.

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