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The digits in a number occupy certain positions, or place values. There are place values for the ones, tens, and hundreds positions.
1 one corresponds to 1 object.

1 ten is equal to 1 group of 10 ones.

1 hundred is equal to 1 group of 100 ones or 10 groups of tens.

In a number, you must look at the place value of each digit to find its value.
In the number 372:
The number 3 represents 3 hundreds or 30 tens or 300 ones.
The number 7 represents 7 tens or 70 ones.
The number 2 represents 2 ones.
