Video Transcript
Find the missing number on the
given number line.
We’re given a number line, and we
have to find the missing number. The number line starts at zero and
ends at 1000. If we start at zero and count
forward, we can see the numbers are increasing by 50 each time. And we can see from the green
arrows that if we count back, the numbers are decreasing by 50 each time. These green arrows are a hint. They’re telling us that we need to
count back in 50s to find the missing number. If we count back from 750, we get
to 700. 650, 600. We’re taking away 50 each time. So what is 50 less than 600? 550, 500, and the next number is
the missing number. What number is 50 less than 500 and
50 more than 400? It’s 450. To find the missing number, we
counted back in 50s. 50 less than 500 is 450. We found the missing number using
the number line.
