### Video Transcript

Which number sentence is
correct? 225 is equal to 240. 225 is less than 240. 225 is greater than 240.

We need to use the number line to
help us decide which number sentence is correct. We’re being asked to compare the
numbers 225 and 240. We know that 225 is not equal to
240 because the numbers are in different places on the number line. If they were equal, the numbers
would be in the same position on the number line. Is 225 less than 240? The number 225 is to the left of
240 on the number line. Let’s start at 240 and count back
to 225. Watch what happens to the numbers
as we count back. 240, 235, 230, 225. The numbers were going down by five
each time. We’re taking away five each time we
count to the left. If the numbers are getting smaller,
that means that 225 is less than 240.

We know that 225 is not greater
than 240. The numbers to the right of 240 are
greater than 240. And 225 is to the left. The number sentence which is
correct is 225 is less than 240.