① ②
③ ④
46÷ 6.8-3.9×+2.8 ÷4+
0.375×5.8+×3.2- (15-14×)×
×× ÷÷ 15÷×
×34× ÷15÷ ×÷
①÷×
②×3.2+6.8÷
③105×(+)
④﹣+﹣
⑤6.4÷[(3﹣1.4)×]