Add:
3
+7


Answer:

10

Step by Step Explanation:
  1. We know that to add 7, we need to take the first addend and count up to 7 digits to obtain the result.
  2. To add 7 to 3, let us begin counting from 3.
    3 + 14 + 15 + 16 + 17 + 18 + 19 + 110
  3. We see that by adding 7 to 3 we get 10.
    So,
    3
    +7
    10

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