脱式计算:3.6-3.6÷0.9×0.8514÷43+87.25×34(229+13)×(236-5316)7.8÷[32×(1-58)+3.6](4.2+94)÷[(21.74-625)×23].-数学
题文
脱式计算: 3.6-3.6÷0.9×0.8
(
7.8÷[32×(1-
(4.2+
|
答案
(1)3.6-3.6÷0.9×0.8 =3.6-4×0.8, =3.6-3.2, =0.4; (2)
=12.75×
=(12.75+87.25)×
=100×
=75; (3)7.8÷[32×(1-
=7.8÷[32×
=7.8÷[12+3.6], =7.8÷15.6, =0.5; (4)(4.2+
|