Add, subtract, multiply fractions and mixed numbers

multiply fractions

100

1/2 x 3/7 =

3/14

200

3/4 x 2/3 =

1/2

300

2 x 4/20 =

2/5

400

1  1/2 x 3 =

4 1/2

500

3 1/2  x  1  4/5

6 3/10

mixed to improper

100

1  2/3

5/3

200

5  9/10

59/10

300

6  3/7

45/7

400

12  3/4

51/4

500

9 4/7

67/7

improper to mixed

100

50/10

5

200

5/3

1 2/3

300

20/3

6 2/3

400

26/4

6 1/2

500

78/10

7 4/5

Miscellaneous

100

Before you multiply mixed numbers you have to...

turn mixed numbers into improper fractions.

200

To change a mixed number into an improper fraction, we have to...

Multiply the denominator by the whole number, add the numerator, keep the denominator the same.

300

What is the LCF (lowest common factor) of 12 and 9?

3

400

Before you can add or subtract fractions or mixed numbers, what must happen?

The denominators have to be the same.

500

How would you write 7/8 as a decimal?

0.875

Add and Subtract

100

2/3 + 5/9

1 2/9

200

4 5/8 - 2 1/4

2 3/8

300

6 3/7 + 4 2/3

11 2/21

400

7 1/8 - 2 1/2

4 5/8

500

(6 2/3 - 2 5/6) x 2 4/7

9 6/7