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Add & subtract mixed numbers
Jul 14, 2015
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copyright©amberpasillas2010
copyright©amberpasillas2010
A mixed number has a part that is a whole number and a part that is a fraction.
= 1 34
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1316+
Shortcut to find the LCD.
Will 3 divide into 6? Use 6 as your LCD.
6
6
103
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1316+
Now find theequivalent
fractions for1/3 & 1/6.
6
6x 1 =
x 2 =
Ask what do you multiply 3 by to get 6and what do you multiply 6 by to get 6.
103
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1316+
You are writing equivalent
fractions, so fill in your Giant One.
6
6x 1 =
x 2 =x 1 =
x 2 =10
3
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1316+
6
6x 1 =
x 2 =x 1 =
x 2 =10
3Now multiply
across.
2
1
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1316+
6
6x 1 =
x 2 =x 1 =
x 2 =10
3
2
1Add
numerators.
36
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1316+
6
6x 1 =
x 2 =x 1 =
x 2 =10
3
2
1
36
Addwhole
numbers.
13
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Simplify Your Answer
3613 3
3 = 13 12
÷÷
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4513+
Find the least common
denominator for5 and 3
15
15
112
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4513+
Ask yourselfwhat you
multiply thedenominatorby to get 15.
15
15x 5 =
x 3 =11
2
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4513+
Fill in your giant one.
15
15 x 5 =
x 3 = x 5 =
x 3 =
2
11
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4513+
15
15 x 5 =
x 3 = x 5 =
x 3 =
2
11 Multiplystraight across.
12
5
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4513+
15
15 x 5 =
x 3 = x 5 =
x 3 =
2
11 12
5Add the
Numerators.Denominator
stays the same.
1715
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4513+
15
15 x 5 =
x 3 = x 5 =
x 3 =
2
11 12
5
1715
15)171
152
215
IMPROPER
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4513+
15
15 x 5 =
x 3 = x 5 =
x 3 =
2
11 12
5
1715
15)171
152
215
IMPROPER
Add Your 1 to Your Whole Numbers1
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4513+
15
15 x 5 =
x 3 = x 5 =
x 3 =
2
11 12
5
1715
15)171
152
215
IMPROPER
Put remainder fraction by answer1
21514
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5658+
24
24 x 3=
x 4 = x 3=
x 4 =
15
20
3524
24
324)35
1
11
1124
24
1
28 1124
IMPROPER
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3513-
15
15 x 5=
x 3 = x 5=
x 3 =
5
9
415
82
6
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3413-
12
12 x 4=
x 3 = x 4=
x 3 =
4
9
512
53
2
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FRACTION REVIEWTake out your study guide
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5658+
24
24x 3 =
x 4 =x 3 =
x 4 =
15
20
3524
24
3 24)351
11
1124
24
1
28 1124
#13
IMPROPER
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