00:01
And give an answer with the correct number of decimal places.
00:03
So i'll do some addition and some subtraction, but i will not do all of them.
00:11
So let me see.
00:13
I feel like i will do first.
00:20
I'll do this one b.
00:21
So 85 .66 plus 104 .10 .10.
00:29
Let me just erase that plus sign because it's a little too close to the one.
00:38
All right, there we go.
00:40
And remember you have to line up your decimals, okay? so 6 plus 0 is 6, 6 plus 1 is 7, bringing down my decimal point, 5 plus 4 is 9, 8 plus 0 is 8, and then a 1.
00:53
Now i'm going to add the 0 .025.
01:00
And so wherever there's an empty spot, i'm going to put a zero.
01:04
I should have done it here too because it helps line everything up and keep everything even.
01:10
So that's a 5, that's an 8, 7, bringing down my decimal point, 981.
01:16
So the answer to this one is 1 point, not 1 point, erase, 10, 189.
01:27
0 .785 is the answer to be.
01:31
The next one i will do is i'll do f, so 460 and then 33 .77.
01:44
Now the decimal point is always at the end of a whole number.
01:48
It's all the way to the right.
01:49
So then wherever there's an empty spot, i'm going to put a zero.
01:54
Now i can't do 0 minus 7 or 0 minus 7 or 0 minus 3.
01:58
Have to borrow from the six.
02:00
The six becomes a five.
02:02
Then that number becomes a 10, but i still need to have something over here.
02:07
So that 10 becomes a nine.
02:09
This 10 now again becomes a nine and that 10.
02:15
So 10 minus seven is three...