Video Transcript
Add 40 to 251. Use the place value blocks if you
need to.
In this question, we need to use
column addition to add 251 and 40. Did you notice that we’ve written
the largest number first, 251? When we’re adding using column
addition, we need to start in the ones column. The number 251 has one one, and the
number 40 has no ones. One plus zero gives us a total of
one. Next, we need to move to the tens
column. 251 has five tens, and 40 has four
tens. What is five plus four? It’s nine. Finally, we just need to add in the
hundreds place. There are two hundreds in the
number 251, but the number 40 has no hundreds, so there’s nothing to add to our two
hundreds. The total is two. 251 plus 40 gives us a total of
291. First, we added the ones, then the
tens, then the hundreds. 251 plus 40 is 291.
