Question

Sendo A= (8/5)+(-6/5)-(-2/5), B={(-1/3)-[(1/5)+(1 1/3)]-2/5} e C=(1/30)+0,5+1/6, indique o valor da expressão A+B+C.

Answer 1

A+B+C

(8/5)+(6/5)-(-2/5)+{(-1/3)-[(1/5)+(1/3)]-2/5}+(1/30)+0,5+1/6=

14/5+2/5+{1/3-[1/5+1/3]-2/5}+1/30+0,5+1/6=

16/5+{1/3-[1/5+1/3]-2/5}+1/30+0,5+1/6=(MMC=15)

16/5+{1/3-[3/15+5/15]-2/5}+1/30+0,5+1/5=

16/5+{1/3-8/15-2/5}+1/30+0,5+1/5= (MMC de 3,5
e 15= 15)

16/5+{5/15-8/15-6/15}+1/30+0,5+1/5=

16/5+{-9/15}+1/30+0,5+1/5=

16/5-9/15+1/30+0,5+1/5=(MMC de 5,15,30=30)

96/30-18/30+1/30+0,5+ 6/30=

95/30+1/2= (MMC de 30,2=30)

95/30+15/30=

110/30