Math Chapter 7

Estimate Fractions

100

Estimate the sum of 

3/8 + 2/7

Approximately 1, since 3/8 is close to 1/2 and 2/7 is close to 1/2

200

Estimate the difference between

5/6 - 1/4

Approximately 1/2, since 5/6 is close to 1 and 1/4 is close to 0

300

Estimate the sum of

1/3 + 3/5

Approximately 1, since 1/3 is close to 1/3 and 3/5 is close to 1/2

400

Estimate the difference between

7/9 - 5/8

Approximately 2, since 7/9 is close to 1 and 5/8 is close to 1.)

500

Estimate the sum of

2/3 + 4/5

Approximately 1 1/2, since 2/3 is close to 1/2 and 4/5 is close to 1

600

Estimate the difference between

9/10 - 5/6

Approximately 2, since 9/10 is close to 1 and 5/6 is close to 1

Common Denominators

100

What is the common denominator for  3/4  and  2/5 ?

20

200

Find the least common denominator (LCD) for  2/3  and  5/6 .

6

300

What is the common denominator for  1/2, 3/4, and 5/6 

12

400

What is the least common denominator (LCD) for  7/8 and 9/12 ?

24

500

Find the common denominator for  1/5, 2/3, and 3/7 

105

600

What is the least common denominator (LCD) for  3/4, 5/6, and 2/3? 

12

Fraction Sums/Differences

100

What is  2/5 + 3/10 ?

7/10

200

What is  7/8 - 3/4 ?

1/8

300

What is  4/9 + 5/18 ?

13/18

400

What is  5/6 - 2/3 ?

1/2

500

What is  3/7 + 5/14 ?

1

600

What is 7/12 - 5/8 ?

1/24

Estimating Mixed Numbers

100

Estimate the sum of  2 3/4 + 1 1/3 .

4, since 2 3/4 is close to 3 and 1 1/3 is close to 1.

200

Estimate the difference between  4 1/2 - 2 1/4 .

2, since 4 1/2 is close to 4 and 2 1/4 is close to 2.

300

Estimate the sum of  3 1/5 + 2 2/3 

6, since 3 1/5 is close to 3 and 2 2/3 is close to 3

400

Estimate the difference between  5 3/8 - 3 5/8 .

2, since 5 3/8 is close to 5 and 3 5/8 is close to 4.

500

Estimate the sum of  6 1/2 + 3 3/4 .

10, since 6 1/2 is close to 6 and 3 3/4 is close to 4.

600

Estimate the difference between  7 2/3 - 3 5/6 .

4, since 7 2/3 is close to 7 and 3 5/6 is close to 4.

Mixed Numbers Sums/Differences

100

What is  1 1/4 + 2 2/5 ?

3 9/20

200

What is  4 3/7 - 2 1/3 ?

2 4/21

300

What is  5 2/3 + 3 1/6 ?

8 5/6

400

What is  7 5/8 - 4 1/2 ?

3 1/8

500

What is  3 3/4 + 2 2/3 ?

6 5/12

600

What is  6 7/8 - 2 4/5 ?

4 3/40

Improper Fractions to Mixed Numbers

100

Convert  7/4  to a mixed number.

1 3/4

200

Convert  11/3  to a mixed number.

3 2/3

300

Convert 15/8 to a mixed number.

1 7/8

400

Convert  9/5  to a mixed number.

1 4/5

500

Convert  19/6  to a mixed number.

3 1/6

600

Convert  25/7  to a mixed number.

3 4/7