FRAME 2-17.
Solution to
Frame 2-16.
Let's look at the problem 1
1
+
2
6
3473
6946
The denominators are not the same, so you must find a common
denominator. Since "6" is a multiple of "2" (2 x 3 = 6), you can change
1/2 to a form that has the same denominator as the other fraction.
1
X.
3
?
=
2
3
?
___________________________________________________________________
FRAME 2-18.
Solution to
Frame 2-17.
Since 3/6 is the same as 1/2, you can substitute (switch) 3/6 for 1/2 and
work the problem.
3
6
1
1
3
1
3+1
?
+
=
+
=
=
2
6
6
6
6
6
___________________________________________________________________
FRAME 2-19.
Solution to
Frame 2-18.
Subtraction of fractions works very similar to addition. Find the common
denominator, change one or both of the fractions until they have the
4
same denominator, and subtract the numerators.
6
Work these problems on your own:
1 _
1
=
2
6
1 _ 1 =
2
10
___________________________________________________________________
FRAME 2-20.
Solution to
Frame 2-19.
What happens, though, when one denominator is not a multiple of the
other. If you can't change the apples to oranges or oranges to apples,
maybe you can change them both to grapefruit. That is, find a common
3-1
2
=
denominator to which both denominators can be changed.
6
6
The common denominator will be a multiple of the _________________
5-1
4
=
of the first fraction and a multiple of the
of
10
10
the second fraction.
___________________________________________________________________
MD0900
2-8