Question

这几道题怎么做啊！谢谢啦

Answer 1

2.18+b
3.y-3.6
4.xy+3.5

Answer 2

2.18+b 3.y-3.6 4.xy+3.5

Answer 3

y-3.6
xy+3.5

Answer 4

18＋b

追答

y－3.6

（xy）＋3.5