00:01
We're being asked to subtract 525 minus 179.
00:04
Well, to do this, i'm going to set this up vertically.
00:07
So i'm going to have 525 minus 179.
00:12
So remember, we always start with our ones column.
00:15
So we're being asked to take away nine ones from five.
00:18
Well, we can't do that.
00:19
We don't have enough.
00:20
So what we have to do is i have to borrow 110 from the tens place.
00:24
So that 2 will now become a 1.
00:26
And now i'm going to add 10 ones to the 5 that i already had.
00:31
So i'm now going to have 15 ones.
00:33
And now i have enough to subtract.
00:35
Well, 15 minus 9 is 6.
00:38
Now i'm going to go to my 10s column.
00:41
Well, i have to do 1 minus 7.
00:42
Well, i don't have enough to take away 7 from 1...