Question

calcule as frações

a)7/8+9/2+1/3=

b)1/5+4/7+4=

c)9/4+2/5+1/7=

d)5/6+2/7+6=

e)¾+2+6/7=

f)7/8-9/2-1/3=

g)1/5-4/7-4=

h)9/4-2/5-1/7=

i)5/6-2/7-6=

j)¾-2-6/7=

​

Answer 1

Resposta:

a)7/8+9/2+1/3= 21/24+108/24 +8/24 =137/24

b)1/5+4/7+4= 7/35 +20/35+140/35  = 167/35

c)9/4+2/5+1/7= 315/140+56/140 +20/140 = 391/140  

d)5/6+2/7+6= 35/42+12/42+252/42  =299 /42

e)¾+2+6/7=21/28+56/28+24/28 =101/28

f)7/8-9/2-1/3= 21/24-108/24-8/24 =-95/24

g)1/5-4/7-4= 7/35 -20/35 -140/35  = -153/35

h)9/4-2/5-1/7= 315/140 -56/140 -20/140 = 239/140

i)5/6-2/7-6= 35/42 -12/42 -252/42 = -229/42

j)¾-2-6/7= 21/28 -56/28 -24/28 = -59/28