①34.13﹣15.87﹣14.13
②1.2﹣3.67+9.8﹣6.33
③25×(0.4+0.04)
④19×956+19×44
⑤23÷2.3﹣2.5×0.8
⑥0.8×[(10﹣6.76)÷1.2]