问题 填空题
3.6×
2
7
+
18
19
×
4
7
+
4
19
×
1
7
=______.
答案

3.6×

2
7
+
18
19
×
4
7
+
4
19
×
1
7

=3.6×

2
7
+
18
19
×
2
7
×2+
2
19
×2×
1
7

=

2
7
×(3.6+
36
19
+
2
19
),

=

2
7
×5.6,

=1.6.

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