Question

Resolva a expressão:​

Answer 1

Resposta:

Explicação passo a passo:

a

15:(-1/3)-(18:9/2)=

15/1.(-3/1)-(18/1.2/9)=

-45/1-(36/9)=

-45-(4)=

-45-4=

-49

b

[3x1/6-(2-1/4)]:2/3=

[3/6-(8/4-1/4)]:2/3=

[3/6-7/4]:2/3=

[6/12-21/12]:2/3=

-15/12:2/3=

-15/12.3/2=

-45/24= [ simplifica por 3]

-15/8

c

-(0,5-5/2)x(-2/5):1/3=

-(1/2-5/2)x(-2/5):1/3=

-(-4/2)x(-2/5):1/3=

4/2x(-2/5):1/3=

-8/10:1/3=

-8/10.3/1=

-24/10= [ simplifica por 2]

-12/5

d

-0,2x[-(-6/5+3/10)+(-3)]=

-2/10x[-(-12/10+3/10)-3]=

-2/10x[-(-9/10)-3]=

-2/10x[+9/10-30/10]=

-2/10x[-21/10]=

+42/100=

0,42