Question

resolva as expressões:
a) -68+ {44+ [29- (40-31+9)]}

b) -100+ (97- [-(-28-37) +(-17-9)])

Answer 1

a) -68+{44+[29]}
-68+{44+29}
-68+73=+5

b)-100+(97-[-(-65)+(-26)])
-100+(97-[+65-26])
-100+(97-[+39])
-100+(97-39)
-100+58= -42