Question

What is `1,321+2,680`?

Answer 1

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.

`=>=>1+0=1`

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

`=>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.

`=>3+6=9`

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

`=>=>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.

`=>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`.

`=>=> 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`