### Video Transcript

Find the result of the following:
234 plus 121 plus 343.

In this question, we have to add
together three three-digit numbers. And we have to use the standard
written method or vertical addition to find the result. We could start by adding the first
two numbers together. So, we would need to add 234 and
121. We’re starting in the ones
column. Four plus one is five. Next, we add the tens. Three 10s and two 10s also gives us
a total of five. And now, we just need to add the
hundreds. Two 100s plus one 100 gives us
three 100s.

Now, all we need to do is add the
third number to the sum of our first two numbers. So, we need to add 343 to 355. Five ones and three ones gives us
eight, five 10s and four 10s gives us a total of nine 10s, and three 100s plus three
100s gives us six 100s altogether. The result of 234 plus 121 plus 343
is 698.