⑴ ⑵
x:=: x-x=
① ② ③
(x-6.4) ÷4=0.16
①6x=18
②x:0.4=10:
③x﹣60%x=2
④=
①0.4x=3.6
②x﹣x=70
③1.6:x=0.8:0.4
①285-285÷19
②67.6÷13+0.8
③ × ÷ +
④( + )÷
⑤8.8×125
⑥ ×[ -( - )]
⑦4.5x-2.5=20
⑧x- x=
⑨x: =12:0.4