问题 解答题
(5.87+1
5
14
+2.13+
9
14
)×(2
3
4
-1.75)+(1÷
2
7
-3.5)×3.99
答案

(5.87+1

5
14
+2.13+
9
14
)×(2
3
4
-1.75)+(1÷
2
7
-3.5)×3.99,

=[(5.87+2.13)+(1

5
14
+
9
14
)]×(2.75-1.75)+(
7
2
-3.5)×3.99,

=[8+2]×1+(3.5-3.5)×3.99,

=10×1+0,

=10.

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