-42 -10-25 0 8
-110 1-1 914
①x:18=:
②
③x-0.25=
①836-192÷8×16
②1.4÷(1.4+0.7)
③0.8×0.4×12.5×0.25
④ ÷6+ ÷20
⑤14×19×( + )
⑥ ÷[( + )÷ ]