Resposta :
a 5+(3-1) = 7
bl (13-4)-8= 1
c) 12-(7-3) = 8
d)(20-3)+(7+5)= 29
e)5-[3+(2-5)= -1
f) 3-[5-4-6]= -12
g) 2+[8-(7-5)-3]= 5
h) -8+[4-(7-13)-1]+5= 6
i) 1-[5+(1-9)]= -12
Espero ter ajudado
a 5+(3-1) = 7
bl (13-4)-8= 1
c) 12-(7-3) = 8
d)(20-3)+(7+5)= 29
e)5-[3+(2-5)= -1
f) 3-[5-4-6]= -12
g) 2+[8-(7-5)-3]= 5
h) -8+[4-(7-13)-1]+5= 6
i) 1-[5+(1-9)]= -12
Espero ter ajudado