Question

=operaçao com fraçao.resolva as operaçoes simplificando o resultado quando for possivel.3-4+4-7= 5-2-1-6= 7-3-5-12= 3-8+7-12=

Answer 1

3-4+4-7= -4
5-2-1-6= -4
7-3-5-12= -13
3-8+7-12=-10