Video Transcript
There are 5,267 students in a
school. 2,247 are boys. How many girls are in the
school?
This is a word problem. We know the total number of
students is 5,267. So this is the whole amount. We also know there are 2,247 boys
in the school. This is one of the parts. We have to calculate how many girls
there are in school. This is the missing part. We can also represent these
quantities using a bar model. We know the total number of
students is 5,267 and the number of boys is 2,247. So to find the number of girls, we
need to find the difference between 5,267 and 2,247. In other words, we need to subtract
2,247 from 5,267. Let’s calculate the answer using
the standard written method.
We need to start by subtracting in
the ones place. Seven take away seven leaves us
with zero ones. Six 10s take away four 10s leaves
us with two 10s. Two 100s take away two 100s leaves
us with zero. And five 1,000s subtract two 1,000s
leaves us with three 1,000s. 5,267 subtract 2,247 is 3,020. If there are 5,267 students in a
school and 2,247 are boys, then 3,020 pupils must be girls. We represented the quantities in
the word problem using a part–whole model and a bar model. This helped us to see that we
needed to find the difference to calculate the number of girls in the school. The number of girls is 3,020.
