Question

resolva as expressões : a ) 30 + { - 15 - [ - 8 ( - 7 + 12 ) ] - 2a } b ) [ 21 × ( - 2 ) ] + [ ( - 2 ) × ( - 14 ) ( - 1 ) ] c ) ( - 16) - ( - 10 ) + [ ( 3 ) × ( 5 ) × ( - 2 ) ] - 10

Answer 1

A)
30+{-15-[-8+5]-2}
30+{-15-[-3]-2}
30+{-15+3-2}
30+{-14}
30-14
R=19

B)[21x(-2)]+[(-2)x(-14)x(-1)]
[-42]+[-28]
-42-28
R=  -70

C)(-16)-(-10)+[(3)x(5)x(-2)]-10
-16+10+[-30]-10
-16+10-30-10
-36-10
R= -46