solve problems

( 1)5 / (5+355) = 1/72

(2) 1/5; 90/5= 18 (m/day)

(3) Scheme 1: 159 tons = 7.5 tons× 20 times +3 tons× 3 times.

Freight: 130×20+60×3 = 2780 yuan.

Scheme 2: 159 tons < 7.5 tons× 2/kloc-0 +3 tons once.

Freight: 130×2 1+ 60 = 2790 (yuan)

Option one. Large trucks carry it 20 times and small trucks carry it 3 times.

6 1.

solve problems

(1)120× 60× 20 =144000 (cubic centimeter)

(2)( 120.96)= 24, with a maximum of 24×24=576 (square centimeter). Because the factor of: 24 is 1, 2, 3, 4, 6, 8, 12, 24. So a square has eight sides and an area of 24.

(3)=35 The 35th day is May 5th.

(4)=36 36+4=40 (person)

Hope to adopt! O(∩_∩)O~