题目内容

下面各题怎样简便就怎样算.
46.7-15.03-4.9712.8-3.68÷2.3
11
12
-
3
4
)÷(1+
1
2
85×0.75+
3
4
×15
1
3
÷[(
2
3
+0.2)×
1
13
].
(1)46.7-15.03-4.97,
=46.7-(15.03+4.97),
=46.7-20,
=26.7;

(2)12.8-3.68÷2.3,
=12.8-1.6,
=11.2;

(3)(
11
12
-
3
4
)÷(1+
1
2
),
=
1
6
÷
3
2

=
1
9


(4)85×0.75+
3
4
×15,
=(85+15)×
3
4

=100×
3
4

=75.
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