(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
+2.13+5 14
)×(29 14
−1.75)+(1÷3 4
−3.5)×3.99. 2 7
答
(5.87+1
+2.13+5 14
)×(29 14
-1.75)+(1÷3 4
-3.5)×3.99,2 7
=[(5.87+2.13)+(1
+5 14
)]×(2.75-1.75)+(9 14
-3.5)×3.99,7 2
=[8+2]×1+(3.5-3.5)×3.99,
=10×1+0,
=10.