用递等式计算:(怎样简便就怎样算)
(1)2÷﹣÷2;
(2)4×0.75+×7.25;
(3)﹣0.75×;
(4)5﹣(3÷0.7×+);
(5)3﹣(0.2+)×4.5;
(6)×[(2.75﹣1.5)÷+2].
用递等式计算:(怎样简便就怎样算)
(1)2÷﹣÷2;
(2)4×0.75+×7.25;
(3)﹣0.75×;
(4)5﹣(3÷0.7×+);
(5)3﹣(0.2+)×4.5;
(6)×[(2.75﹣1.5)÷+2].