Answer:
A point(.) to separate the ones places from tenths place in a decimal.
Explanation:
We have to find the symbol used to separate the ones places from the tenths place in decimal numbers.
We use a point(.) to separate the ones places from tenths place in a decimal.
The place value chart for a decimal is as follows:
Hundreds Tens Ones . Tenths Hundredths Thousandths
For example:
56.98 is a decimal number.
Its expansion can be written as:

We used a point to seperate 6 in ones place from 9 in tenths place.