# What is 1,321+2,680?

Dec 4, 2017

Solution: $1 , 321 + 2 , 680 = 4 , 001$

#### Explanation:

We work right to left when we add or subtract numbers. Therefore let's start the the $1$ and $0$ in both the numbers we're working with.

$\implies \implies 1 + 0 = 1$

This number is in the ones place. No number changes are required.

$\implies 2 + 8 = 10$

Therefore the $1$ of the $10$ gets moved and raised to the next term we'll be dealing with. There zero of the $10$ stays put in the tens place.

$\implies 3 + 6 = 9$

However, since we have that $1$ from the $10$, we must add it to the $9$.

$\implies \implies 9 + 1 = 10$

The zero will stay in the hundreds place, while the one moves to the thousands place.

Another $10$ has been created. Therefore, do the same as above and move the $1$ to the next part.

$\implies 2 + 1 = 3$

Once again, since we have that $1$ from the $10$, we must add it to the number we're working with. This time it's $3$.

$\implies \implies 3 + 1 = 4$

We now can stop here since everything has been added properly. The $4$ will remain in the thousands place permanently.

Therefore, the solution to $1 , 321 + 2 , 680 = 4 , 001$