00:01
All right, in each and every one of your problems, you're being asked to either add fractions or mixed numerals or multiply and divide fractions and mix numerals.
00:10
The first problem is technically what is three -fourths plus one -fourth plus one -half plus one -eight.
00:15
Well, in order to add fractions, you have to have a common denominator.
00:19
And when you look at all of these denominators, the least common denominator is eight.
00:24
So what we have to do here is we have to rewrite each of these fractions with a denominator of eight.
00:30
So this one here multiply the numerator and denominator by two.
00:35
Same thing here, multiply the numerator and denominator by two.
00:40
This one here you've got to multiply the numerator and denominator by four.
00:44
So now your problem is six eighths plus two eights plus four eights plus one eighth.
00:59
And now all we do is add.
01:02
These numerators up, 6 plus 2 is 8, plus 4 is 12, plus 1 is 13.
01:08
So the answer is 13 8s, however your teacher may want you to say that the answer is 1 and 5 8.
01:17
You've got to be able to convert that improper fraction to its mixed numeral form.
01:21
For this next problem, you're adding two mixed numerals, and in order to add mixed numerals, you also have to have a common denominator.
01:29
And the least common denominator, once again, is 8.
01:32
So you got to multiply the top and bottom of this fraction by 2.
01:36
So now your problem is 1 and 1 8th plus 1 in 6 .8s.
01:43
Now when you add mixed numerals, you add the whole numbers.
01:47
1 plus 1 makes 2, and you add the fractional parts.
01:52
1 8 plus 6 8 is 7 .8s...