问题
解答题
化简. (1)
(2)2
(3)(1
|
答案
(1)
,0.2+0.3+0.4+0.5 0.2×0.3×0.4×0.5
=
,1.4 0.012
=116
;2 3
(2)2
÷(32 15
-25 12
)×211 16
+185 8
,2 3
=2
÷2 15
×35 48
+1821 8
,2 3
=
×32 15
×48 35
+1821 8
,2 3
=7
+1817 25
,2 3
=26
;26 75
(3)(1
-1.6)÷[(3.15+12 3
)×113 20
]×12.6,3 4
=(1
-12 3
)÷[(33 5
+13 20
)×113 20
]×12.6,3 4
=
÷[1 15
×24 5
]×12.6,7 4
=
÷1 15
×12.6,42 5
=
×1 15
×12.6,5 42
=
.1 10