Video Transcript
Fill in the missing number. Use the number line if you need
to.
Our missing number is here in the
blue box. It says 16 minus some number equals
eight. On our number line, we’ll start
with 16. The blue dot is on 16. And we know that our final answer,
or the place where we finish, is at eight. So I put a pink dot at the
eight.
The question is, how did we go from
16 to eight? How many numbers did we take
away? Subtraction is like moving to the
left on the number line. Let’s see how many spaces to the
left we moved from 16 to eight: one, two, three, four, five, six, seven, eight. From 16 to eight is left eight
spaces. And that tells us that 16 minus
eight equals eight.
