问题 解答题
(1)3×7×11(
1
3
+
1
7
+
1
11

(2)62.8×12.5÷3.14×0.2.
答案

(1)3×7×11(

1
3
+
1
7
+
1
11
),

=3×7×11×

1
3
+3×7×11×
1
7
+3×7×11×
1
11

=77+33+21,

=131;

(2)62.8×12.5÷3.14×0.2,

=785÷3.14×0.2,

=250×0.2,

=50.

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