Question

fração
por favor me ajudem !!!
exp :
b5/6 +2/6=7/6

c) 3/4+ 1/5=

d)7/8-4/9

e)1/7+3/5+9/14

f) 3- 14/5

g)1 2/11+7/10

h)2 1/5 -1 1/6

i)7+2/9

j) 3/4-1/6

k)1/5 +2 7/8

l) 3 2/5 - 1/7

Answer 1

b)
= 5/6 + 2/6

= 7/6

c)
= 3/4 + 1/5

= 15/20 + 4/20

= 19/20

d)
= 7/8 - 4/9

= 63/72 - 32/72

= 31/72

e)
= 1/7 + 3/5 + 11/6

= 5/35 + 21/35 + 11/6

= 26/35 + 11/6

= 156/210 + 385/210

= 541/210

f)
= 3 - 14/5

= 15/5 - 14/5

= 1/5

g)
= 1 2/11 + 7/10

=( 11x1+2)/11 + 7/10

= 11+2/11 + 7/10

= 13/11 + 7/10

= 130/110 + 77/110

= 207/110

h)
= 2 1/5 + 11/6

= (2x5+1)/5 + 11/6

= 10+1/5 + 11/6

= 11/5 + 11/6

= 66/30 + 55/30

= 121/30

i)
= 7 + 2/9

= 63/9 + 2/9

= 65/9

j)
= 3/4 - 1/6

= 18/24 - 4/24

= 14/24..(÷2)

= 7/12

k)
= 1/5 + 2 7/8

= 1/5 + (8x2+7)/8

= 1/5 + 16+7/8

= 1/5 + 23/8

= 8/40 + 115/40

= 123/40

l)
= 3 2/5 - 1/7

= (5x3+2)/5 - 1/7

= 15+2/5 - 1/7

= 17/5 - 1/7

= 119/35 - 5/35

= 114/35