一、
(1)0.57×98=55.86(元)
(2)0.57×100+0.67×(120-100)
=57+13.4
=70.4(元)
二、
5+1.2×(5.8-3)
=5+3.36
=8.36(元)
三、
38.5+2.8×38
=38.5+106.4
=144.9(元)
一、
(1)0.57×98=55.86(元)
(2)0.57×100+0.67×(120-100)
=57+13.4
=70.4(元)
二、
5+1.2×(5.8-3)
=5+3.36
=8.36(元)
三、
38.5+2.8×38
=38.5+106.4
=144.9(元)