For example: if there are two tens and 15 ones, you could take another ten out of the ones. this makes the adding less complicated
Answer:

Step-by-step explanation:
We first translate the statement into an equation:

Then we simplify:

Answer:
Because we actually divide by 10 when a number is multiplied by 0.1.
Step-by-step explanation:
Let
be a number.
When we multiply a number by 10:
(One '0' is increased in the number)
For example:

Considering a decimal number:

Multiplying a number with 0.1 (which is actually
) means dividing the number by 10.

Considering a decimal number:

<em>Therefore, When multiplying a number by 0.1, move the decimal to the left.</em>