Question

1. resolva as operações abaixo

a)7/5+10/12+1/2
b)15/3+2/10-8/6
c)5/3×12/7
d)10/12÷9/7
e)122/10-22/10-10

GENTEE ME AJUDEM PFV ISSO É PRA AMANHÃA!!!​

Answer 1

1. resolva as operações abaixo:

a)7/5+10/12 (:2)/(:2) +1/2

= 7/5 + 5/6 + 1/2

Mmc (5,6,2)= 30

= (6.7 + 5.5 + 15.1)/15

= (42+25+15)/15

= (42+40)/15

= 82/15

b)15/3+2/10 (:2)/(:2) - 8/6(:2)/(:2)

= 5 + 1/5 - 4/3

= (15.5 + 3.1 - 5.4)/15

= (75 + 3 - 20)/15

= (78 - 20)/15

= 58/15

c)5/3×12/7

= 60/21 (:3)/(:3)

= 20/7

d)10/12÷9/7

= 10/12 (:2)/(:2) . 7/9

= 5/6 . 7/9

= 35/54

e)122/10-22/10-10

= 100/10-10

= 10-10

= 0