问题
解答题
|
答案
(1)15-
+7 18
-1 5
,11 18
=15-(
+11 18
)+7 18
,1 5
=15-1+
,1 5
=14
;1 5
(2)4.2÷1.5-1.5×0.6,
=2.8-0.9,
=1.9;
(3)[2-(
-2 3
)]÷1 2
,11 12
=[2-
]×1 6
,12 11
=
×11 6
,12 11
=2;
(4)(
-5 6
)÷(3 4
+3 14
),2 7
=
÷1 12
,1 2
=
×2,1 12
=
;1 6
(5)
×17 24
+3 4
÷4,17 24
=
×17 24
+3 4
×17 24
,1 4
=
×(17 24
+3 4
),1 4
=
×1,17 24
=
;17 24
(6)
×[8 9
+(15 16
-7 16
)÷1 4
],1 2
=
×[8 9
+15 16
×2],3 16
=
×[8 9
+15 16
],6 16
=
×8 9
,21 16
=
.7 6