# Balance Addition Equations - within 20

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Consider the equation:

5 + 2 = __ + 6

Let's identify the missing number that makes the equation true.

To find the missing number, first we need to add 5 + 2:

5 + 2        ? + 6

7              ? + 6

Now, let’s look for the number which when added to 6 gives 7.

6 + 1 = 7

5 + 2 = 1 + 6

So, the missing number is 1.

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### Help

##### 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.