Fractions

adding

100

25/5 +  45/5=? 

25/5 +  45/5=70/5=12/5

200

3 2/3+5 7/3=?

3 2/3 + 5 7/3= 11/3 + 22/3=33/3=11

300

5/7+27/30?

what is the first step I need to do

?

multiply the denominators.

400

5/7 + 3/6= ?

5/7 + 3/6= 5/7 + 1/2= 10/14 + 7/14= 17/14

500

what are the steps to adding fractions with different denominators?

multiply the denominators

rewrite the problem

add numerators 

add denominators 

then simplify if you can

subtracting

100

1,030/50 - 537/50=

1,030/50 - 537/50=493/50

200

525/20 - 375/20 =?

525/20 - 375/20 =150/20=7.5

300

what do I do with the mixed numbers?

multiply mixed number with denominator and then add the numerator.

500

20 3/7 - 5 27/ 3=?

20 3/7 - 5 27/ 3=143/7 -42/3= 143/21 - 42/21=101/21

division

100

2/7 / 1/2=?

2/7 / 1/2=4/7

200

27/3 / 5/7=?

27/3 / 5/7= 27/3 * 7/5 =189/15

400

35 6/7 / 2/3?

35 6/7 / 2/3= 251 /7 * 3/2=753/14

multiplication

100

1/2 * 1/4 =

1/2 * 1/4 =1/8

200

1 3/4 * 1/2= 

1 3/4 * 1/2= 7/4 * 1/2 = 7/8

400

3 7/6 *5/3= 

3 7/6 *5/3= 25/6 *5/3=125/18=6.9444...

reducing

100

4/8

1/2

200

4/10

2/5

400

24/36

2/3