问题
解答题
|
答案
解(1)(
+5 12
+1 9
)×72,3 8
=72×
+72×5 12
+1 9
×72,3 8
=30+8+27,
=65;
(2)(2-
×3 4
)÷(4 5
+1 12
),4 15
=(2-
)÷(3 5
+5 60
),16 60
=
×7 5
,60 21
=4;
(3)5
-(12 5
+35 6
),3 10
=5
-(112 30
+325 30
),9 30
=4
-442 30
,34 30
=
;4 15
(4)[(2
+4.8÷11 3
)-43 5
]×11 6
,1 2
=[(2
+3)-41 3
]×1 6
,3 2
=[5
-42 6
]×1 6
,3 2
=
×7 6
,3 2
=1
.3 4