### Video Transcript

Perform the following
subtraction. 24 subtract seven equals what.

In this question, we’re subtracting
a one-digit number, which is the number seven, from 24, which is a two-digit
number. And we’re using the column
subtraction method. We need to start by subtracting in
the ones column. 24 has four ones and we need to
subtract seven ones. Now we have a problem. Four is less than seven. We don’t have enough ones to
subtract from. We’re going to need to regroup. We need to regroup one of our tens
into 10 ones. So instead of having two 10s, we’ll
have one 10. And instead of having four ones,
we’ll have 14 ones. So now we can subtract in the ones
column. What is 14 subtract seven? 14 take away seven is seven.

Now all we have to do is subtract
in the tens column. And because we’re subtracting a
one-digit number from a two-digit number, there’s nothing to subtract from our one
remaining 10. One 10 take away no 10s leaves us
with one 10. 24 subtract seven equals 17. We used the column subtraction
method to find our answer. First, we subtracted in the ones
column. And we had to regroup one of our
10s into 10 ones. Then we subtracted in the tens
column to give us our answer of 17.