"The steeper the slope is, the greater the free rolling distance is when the object rolls down from the slope" () Check or cross in brackets? The teacher will change tomorrow

"The steeper the slope is, the greater the free rolling distance is when the object rolls down from the slope" () Check or cross in brackets? The teacher will change tomorrow

It should be X
Well, consider the height of the slope

The financial member made a mistake in the decimal point, resulting in an extra 10 yuan and 35 cents. What's the correct number?

Since I haven't learned equation in the fourth grade, I use arithmetic
The extra 10 yuan and 35 cents means that the decimal point has moved one place to the right and the number has increased by 10 times
That is 10-1 = 9 times more than the original, which is exactly 10 yuan and 35 cents
The correct number is: 10.35 △ 9 = 1.15 (yuan)

A fun math problem
At the beginning of the year, a shipping company bought a transport ship with 1.28 million yuan. After it was put into transportation, the total annual transportation income was 720000 yuan, and the expenses were 400000 yuan
(1) How many years can the ship earn back the cost?
(2) If the ship has to be scrapped after 15 years of transportation, 200000 yuan can be recovered from the sale of the old ship when scrapped. How about the average annual profit of these 15 years?

(1)128/(72-40)=4
A. the cost can be recovered after 4 years of transportation
（2）15（72-40）-128=352
352+20=372
372/15=24.8
The average annual profit of these 15 years is 248000 yuan

To solve it! The more the better!
First let you find the problem, and then do the problem!

It takes 40 days for team B to finish the rest of the road. It is known that team B repairs 8 kilometers more every day than team a, and 120 kilometers more in the next 20 days than the previous 20 days. How many days did Team B repair? 120 divided by 8 equals 15 days, because there are some days of team a and all days of team B in the last 20 days