Chang 'e-1 is about (4 18) kg heavier than Shenzhou-8.
What can be simplified should be simplified:
24×( 18-4×3)÷3 (24/ 19+ 16/ 17)× 1/8+ 15/ 17
=48
Application questions:
1. Orchards sell apples in different grades, and the best apples are the first grade, with 3.6 yuan per kilogram; Followed by second class, the price per kilogram is 2.8 yuan; The last one is third class, and the price per kilogram is 2. 1 yuan. Now the mass ratio of three kinds of apples is 2: 3; 1。 If these three kinds of apples are sold together, how much do you think is appropriate per kilogram?
(3.6*2+2.8*3+2. 1)/6=2.95