(5.87+15/14+2.13+9/14)×(23/4−1.75)+(1÷2/7−3.5)×3.99.

问题描述:

(5.87+1

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

(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.