A batch of timber was sold in the first morning, half of which was sold in the afternoon, and three tons in the afternoon. The next morning, half of the remaining timber was sold, and three tons in the afternoon One morning, half of the remaining timber was sold, and in the afternoon, three tons were sold. At this time, one ton of timber was left. How many tons of timber did the timber factory have?

A batch of timber was sold in the first morning, half of which was sold in the afternoon, and three tons in the afternoon. The next morning, half of the remaining timber was sold, and three tons in the afternoon One morning, half of the remaining timber was sold, and in the afternoon, three tons were sold. At this time, one ton of timber was left. How many tons of timber did the timber factory have?

{【（1+3）×2+3】×2+3}×2
={11×2+3}×2
=50 tons

A factory shipped 60 cases of goods in three days, 20 cases in the first day and half of the first day in the second day. How many cases in the third day
It must be an equation, an equation

Let X be carried out
X+20+20*(1/2)=60
Solve the equation x = 30 boxes

A transport team carries 84.5 tons of goods on the first day, 18 tons more than on the second day and 57.5 tons less than twice on the third day?

[84.5 + (84.5-18) + (84.5 + 57.5) △ 2] / 3, = [84.5 + 66.5 + 71] / 3, = 222 △ 3, = 74 (tons). A: the average daily freight is 74 tons

A transport team carries 80 tons of goods in the first day, which is 1.3 times of that in the second day, and 2.4 times more than that in the third day. How many tons of goods are transported in the three days?
#Is divided by, * is multiplied, plus +, minus -, parentheses (), brackets []
Write down the reason for solving the problem

The first step: the transportation volume of the second day: 80 × 4 / 3 = 60 tons;
Every two steps: the third day transport volume: 80-2.75 = 77.25 tons
Sum of three days: 60 + 80 + 77.25 = 217.25 tons