Answer:
1, C,
2, 1 7/20
3, 7/12
4, 9/10
5, 19/25
Step-by-step explanation:
1, You need to find LCD for every fraction add or subtract question
2, 3/4 + 6/10.
LCD: 20,
4 x 5=20 and times 3 by 5 to get 15 (15/20),
10 x 2 =20 and 6 times 2 to get 12 (12/20).
Now you may add them together which is 12/20 + 15/20= 27/20, simplify:
1 7/20
3, 1/6 + 1/4.
LCD: 12
6 x 2= 12, 1 x 2=2 (2/12)
4 x 3= 12, 1 x 3=3 (3/12)
add, now 5/12
the whole was 12/12 of pie so now subtract
12/12 - 5/12= 7/12
4, 1/6 + 2/5 + 1/3.
LCD: 30
6 x 5=30, 1 x 5= 5 (5/30)
5 x 6= 30, 2 x 6=12 (12/30)
3 x 10= 30, 1 x 10= 10 (10/30)
add, 5 + 12 + 10= 27 (27/30)
simplify: 9/10
5, 14/25 + 1/5.
LCD: 25
14/25 (stay still)
5 x 5=25, 1 x 5= 5 (5/25)
add, 15 + 4 = 19 (19/25)
can not be simplify
