# Subtract Two 2-digit Numbers - Within 100

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To subtract two digit numbers, first align the numbers so that place values are lined up.

Subtract ones regroup if needed and then subtract tens.

For example: Let's find the difference of 45 and 16.

Align the numbers and subtract ones. Regroup if needed.

 3 15 4 5 – 1 6
 9

Now, subtract the tens.

 3 15 4 5 – 1 6
 2 9

The difference of 45 and 16 is 29.

ds

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### Help

The correct answer is

##### Remember :

The smallest number is the one that comes first while counting.

##### Solution :

To arrange the given numbers in order from smallest to greatest, find the smallest number among all the given numbers.

21,27,23

21 is the smallest number.