Name: ___________________
Date:___________________
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MEAP Preparation - Grade 7 Mathematics
1.86 Addition and Subtraction of Mixed Fractions with Unlike Denominators
Method:
Add or subtract the whole numbers
Add the fractional part
Example
: 1 1/2 + 3 3/4
Add the whole numbers 1 and 3 which gives 4.
Add the fractional part, 1/2 + 3/4
LCM of 2 and 4 is 4.
1/2 x 4/4 = 2/4
3/4 x 4/4 = 3/4
Add the fractions 2/4 + 3/4 = 5/4
Answer: 4 5/4
Example
: 7 1/2 - 3 1/4
Subtract the whole numbers (7-3) which gives 4.
Subtract the fractional part.
1/2 - 3/4
LCM of 2 and 4 is 4.
1/2 x 4/4 = 2/4
1/4 x 4/4 = 1/4
(2-1)/4 = 1/4
Answer: 4 1/4
Directions:
Add or subtract the following mixed fractions. Also write at least ten examples of your own.
Name: ___________________
Date:___________________
MEAP Preparation - Grade 7 Mathematics
1.86 Addition and Subtraction of Mixed Fractions with Unlike Denominators
Q 1
: 3 1/8 + 4 2/4 =
7 3/8
1 3/4
7 5/8
Q 2
: 2 3/9 + 1 1/3 =
3 2/3
1 4/9
3 4/9
Q 3
: 6/12 + 1/4 =
7/12
3/4
2/4
Q 4
: 8 2/5 + 7 1/3 =
15 11/15
15 3/10
15 3/5
Q 5
: 9 5/7 + 6 1/2 =
16 3/14
15 6/7
15 17/14
Q 6
: 5 1/2 - 3 2/5 =
2 5/10
2 1/5
2 1/10
Q 7
: 10 3/4 - 5 3/5 =
5 0/5
5 6/20
5 3/20
Q 8
: 7 3/7 - 2 2/3 =
4 16/21
5 1/7
5 1/21
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Question 10: This question is available to subscribers only!
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