# How do you simplify #4.7-1.9#?

##### 2 Answers

The explanation takes longer than doing the actual mathematics.

#### Explanation:

A portion of this calculation is done in my mind

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Take 1 from the 4 and put it with the 0.7

But

Because we have removed 1 from the 4 it becomes 3.

It looks like this:

............................................................................................

Putting it all together:

2.8

#### Explanation:

think of 1.9 as

So if you subtract 2 you have removed 0.1 too much. So you put it back.

Now put back the 0.1