题目内容

下面各题怎么简便就怎么算
42×(
5
6
-
3
7
+
3
14

48×75%+53×
3
4
-0.75
45÷7+19×
1
7
-
1
7

3
4
-
3
16
)×(
2
9
+
1
3
(1)42×(
5
6
-
3
7
+
3
14
),
=42×
5
6
-42×
3
7
+42×
3
14

=35-18+9,
=26;

(2)48×75%+53×
3
4
-0.75,
=48×0.75+53×0.75-0.75,
=0.75×(48+53-1),
=0.75×100,
=75;

(3)45÷7+19×
1
7
-
1
7

=45×
1
7
+19×
1
7
-
1
7
×1,
=(45+19-1)×
1
7

=63×
1
7

=9;

(4)(
3
4
-
3
16
)×(
2
9
+
1
3

=
9
16
×
5
9

=
5
16
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