One ton of chemical fertilizer is transported by one fifth on the first day and 40 tons on the second day. At this time, the remaining is just three fourths of the original total. How many tons are transported on the first day

One ton of chemical fertilizer is transported by one fifth on the first day and 40 tons on the second day. At this time, the remaining is just three fourths of the original total. How many tons are transported on the first day

40 ± (1-3 / 4-1 / 5) = 40 ^ (1-0.75-0.2) = 40 ^ 0.05 = 800 tons
800x1 / 5 = 160 tons
A: 160 tons were transported on the first day

There is a batch of chemical fertilizer in the warehouse. 40% of the total amount was transported on the first day, and 75% of the total amount was transported on the second day. How many percent of the total amount will be transported
Don't use solving equations

1-40%-40%×75%
=60%-30%
=30%
So it's going to take another 30%

A certain agricultural trade company had to transport back a batch of chemical fertilizer. One fifth of the fertilizer was transported back the first day, and 40 tons the next day. At this time, the rest was just 3 / 4 of the total amount
How many tons does it cost to ship it back on the first day?

If the total number is x, then 1 / 5 * x + 40 = (1-4 / 3) * x, x = 800, that is, 800 * 1 / 5 = 160 on the first day

A total of 100 tons of goods were transported in the first time, 1 / 4 of the total, and 1 / 5 of the total in the second time. How many more tons were transported in the first time than in the second time? How many tons were transported in the two times?

How many tons more than the second one?
100 × (1 / 4-1 / 5) = 5 (ton)
How many tons are transported together?
100 × (1 / 4 + 1 / 5) = 45 (tons)