Question

Calcule o valor de cada expressão/URGENTE

(0,3 + 0,5) - (-2 - 4/5) =

(1/6 + 2/3) - 4/10 - 3/5) + 1/3 =

0,2 + (2/3 - 1/4) - (-7/12 + 4/3) =

Answer 1

( 0,3 + 0,5) -  ( -2 - 4/5 )
( 3/10 + 5/10) - ( -2/1 - 4/5)
3/10 + 5/10 + 2/1+ 4/5 
mmc = 10
( 3 + 5 + 20 + 8)/10 =36/10 = 18/5 ***
b
( 1/6 + 2/3) - 4/10 - 3/5  + 1/3 =
1/6 + 2/3 - 4/10 - 3/5 + 1/3 =
mmc = 30
( 5 + 20 - 12 - 18 + 10 )/30 =
( +35 -30 )/30 = 5/30 = 1/6 ***

c
0,2 + ( 2//3 - 1/4) - ( - 7/12 + 4/3 ) =
2/10 +  2/3 - 1/4 + 7/12 - 4/3 =
mmc = 60
( 12 + 40 - 15 + 35 - 80 )/60 =
( +87 - 95 )/60 = -8/60 = -2/15 ****