( )( )=( )(辆)
答:停车场还剩( )辆车。
6+=13 12-=9 -8=7
42-2=+20
15+4=
12-5=
4+9=
8+7-9=
14-8=
16-9=
15-6=
17-8+5
57-7=
40+5=
70+8=
80-50-10=
8+20=
57-50=
35-5=
14-5+90=
30+223 60+970 68-★78-★
28-819+10 15-612+4 50+★40+★