问题 解答题
8.5×
3
4
+0.75×5+6.5÷1
1
3
答案

8.5×

3
4
+0.75×5+6.5÷1
1
3

=8.5×

3
4
+0.75×5+6.5×
3
4

=(8.5+5+6.5)×0.75,

=20×0.75,

=15.

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