问题 解答题
怎样简便就怎样计算.
①4×
2
7
+4÷
7
5
②5×
1
3
×
4
5
×
3
10
③41×101
④8.5-(5.6+4.8)÷1.3⑤12×(
1
4
+
1
6
-
1
3
)⑥
11
13
-(
8
9
-
1
13
答案

①4×

2
7
+4÷
7
5

=(

2
7
+
5
7
)×4,

=1×4,

=4;

②5×

1
3
×
4
5
×
3
10

=(5×

4
5
)×(
1
3
×
3
10
),

=4×

1
10

=

2
5

③41×101,

=41×100+41×1,

=4100+41,

=4141;

④8.5-(5.6+4.8)÷1.3,

=8.5-10.4÷1.3,

=8.5-8,

=0.5;

⑤12×(

1
4
+
1
6
-
1
3
),

=12×

1
4
+12×
1
6
-12×
1
3

=3+2-4,

=1;

11
13
-(
8
9
-
1
13
),

=

11
13
+
1
13
-
8
9

=

12
13
-
8
9

=

4
117

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