1﹣ + = 1÷ × = 0.5﹣ +0.5﹣ =
8.1+ = ( + )×24= 7× ×7÷ =
9﹣0.9= 72÷0.4= 1.25×8=
①
②
③87×
④4.22+(5﹣ )
⑤2﹣
⑥
②8:30=24:x
③
④ : =x