Vietnam
Add:
| 1 | |
| + | 9 |
Answer:
10
- We know that to add 9, we need to take the first addend and count up to 9 digits to obtain the result.
- To add 9 to 1, let us begin counting from 1.
1 2 3 4 5 6 7 8 9 10 - We see that by adding 9 to 1 we get 10.
So,1 + 9 10
