fractions
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Presented By: Aisha Mubarak-Presented By: Aisha Mubarak-Sara hamadSara hamadSupervised By: Dr. A. Al-Supervised By: Dr. A. Al-FailakawayFailakaway
Fractions
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Definition:
A fraction is an ordered pair of whole numbers, the 1st one is usually written on top of the other, such as ½ or ¾ .
numerator
denominatorba
7, 14, 21, 28, 35…
2, 4, 6, 8, 10, 12, 14, 16, 18, 20
Common Denominatoris needed to add these fractions.
1-Adding Fractions
x 2
x 2
X 7
x 7 7
6
7 + 6 = 13
13
More Examples:
8
1
24
23
8
1
4
3
7
2
5
3
9
4
6
5
=
=
=
57
52
75
73
69
64
96
95
=
=
=
8
1
8
6 =
8
7
8
16
35
10
35
21
35
31
35
1021
=
54
24
54
45
54
151
54
69
54
2445
=
5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55
We need a common denominator to
subtract a fraction from another.
11, 22, 33, 44, 55, 66, 77…
2-Subtracting Fractions
x 5
x 5
x 11
x 11
4
15 - 11 = 4
15
11
More Examples:
16
7
16
15
16
715
2
1
16
8
9
4
7
6
79
74
97
96
63
28
63
54
63
2854 26
63
23
11
10
7
1023
1011
2310
237
2310
1011237
230
110161
230
51
Try These
A
F
EB
C
D
Try These
A
F
EB
C
D1727
1920
109
4128
2621
1312
Questions ?