问题
解答题
|
答案
(1)36×(
+1 2
+1 3
),1 4
=36×
+36×1 2
+36×1 3
,1 4
=18+12+9,
=39;
(2)
×[0.75-(5 7
+0.25)],1 2
=
×[0.75-5 7
-0.25],1 2
=
×[0.75-0.25-5 7
],1 2
=
×[0.5-0.5],5 7
=
×0,5 7
=0;
(3)1.25+(
-5 6
)×12,1 4
=1.25+(
×12-5 6
×12),1 4
=1.25+(10-3),
=1.25+7,
=8.25.