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Online Quiz (Worksheet A B C D)

Questions Per Quiz = 2 4 6 8 10

MEAP Preparation - Grade 7 Mathematics
1.11 Addition of Three Mixed Numbers

Addition of three mixed numbers with like denominators

Example:
5 4/7 + 2 3/7 + 3 1/7 = ?

Method 1:
Add integer parts: 5 + 2 + 3 = 10
Add fraction parts: 4/7 + 3/7 + 1/7 = 8/7 = 1 1/7
5 4/7 + 2 3/7 + 3 1/7 = 10 + 1 1/7 = 11 1/7

Method 2:
5 4/7 + 2 3/7 + 3 1/7
Convert mixed fractions to improper fractions and then add them.
5 4/7 + 2 3/7 + 3 1/7 = 39/7 + 17/7 + 22/7
= 78/7
= 11 1/7

Addition of three mixed numbers with unlike denominators

Example:
3 1/8 + 2 1/2 + 4 3/5 = ?

Method 1:
Add integer parts: 3 + 2 + 4 = 9
Add fraction parts: 1/8 + 1/2 + 3/5 = 49/40 = 1 9/40
3 1/8 + 2 1/2 + 4 3/5 = 9 + 1 9/40 = 10 9/40

Method 2:
Convert mixed fractions to improper fractions and then add them.
3 1/8 + 2 1/2 + 4 3/5 = 25/8 + 5/2 + 23/5 = 818/80
= 10 9/40

Directions: Solve the following problems. Also write at least 5 examples of your own for each case shown above.
Q 1: 3 1/5 + 2 1/5 =
5 1/5
5 2/5
4 1/5

 Q 2: 15 2/7 + 5 1/7 =
20 3/7
20 4/7
20 2/7

Q 3: 2 1/5 + 3 1/3 =
15 5/8
8 5/15
5 8/15

 Q 4: 2 3/8 + 1 1/8 =
3 1/4
3 2/3
3 1/2

Q 5: 3 1/4 + 2 1/7 =
11 5/28
5 11/28
5 12/27

 Q 6: 5 1/6 + 2 5/6 =
7
6
8

Q 7: 12 4/3 + 11 1/3 + 2 2/3 =
27 1/6
27 1/3
27 1/4

 Q 8: 3 1/12 + 4 3/12 =
7 1/6
7 1/7
7 1/3

Question 9: This question is available to subscribers only!

 Question 10: This question is available to subscribers only!


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