Add three or more one-digit numbers

4 + 0 + 1 = _____

First, add 4 and 0:

4 + 0 + 1 = ?

4 + 1 = ?

Now add 4 and 1:

4 + 1 = 5

The sum is 5.

5 + 6 + 1 = _____

First, add 5 and 6:

5 + 6 + 1 = ?

11 + 1 = ?

Now add 11 and 1:

11 + 1 = 12

The sum is 12.

5 + 9 + 6 = _____

First, add 5 and 9:

5 + 9 + 6 = ?

14 + 6 = ?

Now add 14 and 6:

14 + 6 = 20

The sum is 20.

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