问题 解答题
计算(能简算的要简算):
2
13
÷14+
1
14
×
11
13

45.6-(5.6-4.17)
32×0.125×2.5
(1
1
2
-0.375)÷[
1
25
+(
2
5
+2.1)]
答案

(1)

2
13
÷14+
1
14
×
11
13

=

2
13
×
1
14
+
1
14
×
11
13

=(

2
13
+
11
13
)×
1
14

=1×

1
14

=

1
14

(2)45.6-(5.6-4.17),

=45.6-5.6+4.17,

=40+4.17,

=44.17;

(3)32×0.125×2.5,

=8×4×0.125×2.5,

=(8×0.125)×(4×2.5),

=1×10,

=10;

(4)(1

1
2
-0.375)÷[
1
25
+(
2
5
+2.1)],

=1

1
8
÷[
1
25
+2
1
2
],

=1

1
8
÷2
27
50

=

9
8
×
50
127

=

225
508

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