The construction site needs 1280 bags of cement, which can be transported by eight trucks four times. How many bags of chemical fertilizer can be transported by one truck at a time? (calculated by two methods)

The construction site needs 1280 bags of cement, which can be transported by eight trucks four times. How many bags of chemical fertilizer can be transported by one truck at a time? (calculated by two methods)

The first method: Transport 1280 bags of cement, the number of times the truck needs to transport: 4 * 8 = 32
Number of bags transported by one cart: 1280 / 32 = 40
The second method: the number of cement bags transported by each truck: 1280 / 8 = 160
Bags per Cart: 160 / 4 = 40
The construction site needs 1280 bags of cement, which can be transported by 8 trucks four times. How many bags of chemical fertilizer can be transported by one truck at a time
40 bags
Five trucks can transport 750 bales of cement. According to this calculation, if 10 more trucks are added, they will be transported completely. How many bales of cement are there in total
A: there are 2250 bales of this batch of cement
750 / 5 = 150 15 * 150 = 2250
One truck transports 13.5 tons of cement three times. Most importantly, how many times can 63 tons of cement be transported?
14 times
13.5 divided by 3 = 4.5
63 divided by 4.5 = 14
From city a to city B, the big car takes 8 hours and the small car takes 5 hours. The speed of the small car is faster than that of the big car ()
1 out of 5 minus 1 out of 8 = 3 out of 40, that is, 3 out of 40 of the whole course
V cart = 1 / 8 V trolley = 1 / 5
V=1/5-1/8=3/40
one point one three five
Divide the difference between one fifth and one eighth by one fifth
There are 800 tons of grain stored in warehouse A and warehouse B. the grain stored in warehouse A is 1.5 times of that in warehouse B. how much more grain is stored in warehouse A than in warehouse B?
How to calculate. Please say an equation. Thank you
Suppose B warehouse is unknown, X warehouse is 1.5x
5 x + x = 800
X=320
1.5X=480
So 480-320 = 160
1*3*5+3*5*7+5*7*9+…… +17*19*21=?
Obviously there are:
1×3×5＝［1×3×5×7－（－1）×1×3×5］/8,
3×5×7＝（3×5×7×9－1×3×5×7）/8,
5×7×9＝（5×7×9×11－3×5×7×9）/8,
7×9×11＝（7×9×11×13－5×7×9×11）/8,
······
17×19×21＝（17×19×21×23－15×17×19×21）/8.
The above formulas are added together
1×3×5＋3×5×7＋5×7×9＋7×9×11＋······＋17×19×21
＝［17×19×21×23－（－1）×1×3×5］/8
＝［（20＋3）（20－3）（20＋1）（20－1）＋15］/8
＝［（400－9）（400－1）＋15］/8
＝（160000－10×400＋9＋15）/8
＝156024/8
＝19503.
nineteen thousand five hundred and three
There are 100 pages in a story book. Xiao Ming read 24 pages on the first day and 31 pages on the second day. What percentage of the book is left?
100-24-31 = 45 (page) 45 △ 100 = 9 / 20
A: Nine twentieth of the book is left blank
(nine out of twenty can't be typed. Just write the numbers,
It takes 8 hours for the bus to arrive from city a to city B. what's the average travel time per hour? What's the average travel time per 5 hours?
Question 1 / 8
Question 2 1 / 8 * 5 = 5 / 8
1。 One eighth two. five-eighths
one eighth
1. Two eighths, five eighths
The grain stored in warehouse A is one fourth more than that in warehouse B, so the ratio of warehouse A and warehouse B to the total grain stored is ()
If a is one fourth more than B, then the two warehouses can be divided into four equal parts
Then: a stores 5 equal portions of grain, B stores 4 equal portions of grain
The ratio of warehouse A to total grain storage is 5:9
The ratio of warehouse B to total grain storage is 4:9