Question

1-Resolva as expressões
(arme e efetue)

a){ [ (18-3)+(7+5)-2]+5}-12=


b)65-{30-[20-[10-1+6)+1]}=


c)45+{15-[(10-8)+(7-4)-3]-4}=


d)40+{50-[35+5)-1] }+7=


e)86+(31-16+60)-200-70-50)=


f) (79+21-84)+(63-41+17)-26=

​

Answer 1

Explicação passo-a-passo:

1-Resolva as expressões

(arme e efetue)

a){ [ (18-3)+(7+5)-2]+5}-12=

{[(15)+(12)-2]+5}-12=

{[27-2]+5}-12=

{[25]+5}-12=

{30}-12=

18

b)65-{30-[20-[10-1+6)+1]}=

65-{30-[20-(9+6)+1]}=

65-{30-[20-(15)+1]}=

65-{30-[5+1]}=

65-{30-[6]}=

65-{24}=

41

c)45+{15-[(10-8)+(7-4)-3]-4}=

45+{15-[(2)+(3)-3]-4}=

45+{15-[5-3]-4}=

45+{15-[2]-4}=

45+{13-4}=

45+{9}=

54

d)40+{50-[35+5)-1] }+7=

40+{50-[(40)-1]}+7=

40+{50-[39]}+7=

40+{11}+7=

51+7=

58

e)86+(31-16+60)-200-70-50)=

86+(15+60)-200-70-50=

86+(75)-270-50=

161-270-50=

-109-50=

-159

f) (79+21-84)+(63-41+17)-26=

(100-84)+(22+17)-26=

(16)+(39)-26=

55-26=

29

Espero ter ajudado ♥️.