00:01
We're being asked to subtract 486 minus 257.
00:04
So to do this, i'm going to write this problem vertically.
00:07
So 486 minus 257.
00:09
And remember, we're going to start with our ones column.
00:12
So we're being asked to take away seven from six, but we don't have enough.
00:16
So we're going to have to borrow from the tens.
00:19
So i'm going to borrow 110, which means i'll have seven remaining, and i'm going to add 10 ones to the six that i already had, which means i now have 16 ones.
00:28
And now i can go ahead and subtract.
00:31
Well, 16 minus 7 is 9.
00:33
Now i go to the 10s column...