题目内容

计算下面各题,怎样算简便就怎样算. 
9.43-2.6+8.57-3.4
12×(
1
4
+
1
6
-
1
3
)

375+450÷18×2
5(
4
5
+
1
4
7
3
+
7
10

(1)9.43-2.6+8.57-3.4,

=(9.43+8.57)-(2.6+3.4),

=18-6,

=12;



(2)12×(
1
4
+
1
6
-
1
3
)


=12×
1
4
+12×
1
6
-12×
1
3


=3+2-4,
=5-4,
=1;


(3)375+450÷18×25,

=375+25×25,
=375+625,
=1000;


(4)(
4
5
+
1
4
7
3
+
7
10


=
21
20
÷
7
3
+
7
10

=
9
20
+
7
10

=
23
20
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