Xiao Hong read a 120 page story book. On the first day, she read 12 of the whole book. On the second day, she read the remaining 12. On the third day, what page should she begin to read?

Xiao Hong read a 120 page story book. On the first day, she read 12 of the whole book. On the second day, she read the remaining 12. On the third day, what page should she begin to read?

120 × 12 + (120-120 × 12) × 12 + 1 = 60 + (120-60) × 12: = 60 + 60 × 12 + 1 = 60 + 30 + 1 = 91 (page)
How many times is the speed of a freight car? How many times is the speed of a freight car?
The speed of passenger car is 60 / 45 = 1.33 times that of freight car
The speed of a freight car is 45 / 60 = 3 / 4 of that of a passenger car
The weight ratio of rice stored in warehouse A and warehouse B is 8:7. If 14 tons are transported from warehouse A and 8 tons are transported into warehouse B, then the amount of rice stored in warehouse B is 17 tons more than that in warehouse A. how many tons of rice did warehouse a have?
(17-8) △ 78 - (1-14)], = 9 △ 78-34, = 9 △ 18, = 9 × 8, = 72 tons; a: there were 72 tons of rice in warehouse a
Fill in the brackets with the same number 17 + () 33 + () = 35
Let this number be x, then 17 + x33 + x = 35, & nbsp; 3 × (33 + x) = 5 × (17 + x), & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 99 + 3x = 85 + 5x, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 5x-3x = 99-85, & nbsp; & nbsp; & n
How many pages of the whole book should I read from the first day?
120x (1 / 8 + 20%) = 39 pages
The third day starts from page 40
76。。。 120 times 1 / 8 times 20% = 75,75 + 1 = 76 (page)
Forty
From city a to city B, the bus runs for 10 hours and the truck runs for 15 hours
Seven hours later, the distance between the two cars is 140 kilometers. How many kilometers is the distance between the two cities
7 hours, a opened 7 / 10, B opened 7 / 15, more than the whole process
So 140 / (7 / 15 + 7 / 10-1) = 840 km
The weight ratio of grain stored in warehouse A and warehouse B is 8:7. If 14 tons of grain are transported out of warehouse A and 8 tons are transported in warehouse B, then the grain stored in warehouse B is 15 tons more than that in warehouse A, and how many tons of grain was stored in warehouse a?
The original storage of the original grain in the original storage of the original storage of the original storage in the warehouse is x tons, X (x (1-14-14) + 15 = 78x + 8, which is the X, X (1-14-14) + 15 = 78x + 8 + 8, which is the x-t, X (1-14-14) + 15 = 15 = 78x + 8 + 8, and the & nbsp; & nbsp & nbsp; & nbsp; & nbsp & nbsp & nbsp; & nbsp & nbsp; & nbsp; & nbsp & nbsp; & nbsp & nbsp & nbsp; & nbsp; & nbsp; & nbsp & nbsp & nbsp; & nbsp & nbsp; & nbsp; & nbsp; & nbsp & nbsp; & nbsp & nbsp; & nbsp & nbsp; & nbsp & nbsp & nbsp; & nbsp & nbsp; & nbsp & nbsp & nbsp; & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp; & nbsp & nbsp; & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp; & nbsp & nbsp & nbsp & nbsp; & nbsp & nbsp & nbsp & nbsp & nbsp & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; &X = 56, a: warehouse a used to store 56 tons of grain
Look, think, calculate. Which numbers should be filled in the following question △ 2, 3, 5, 9, 17, △ 129
A. 33，65B. 32，63C. 31，61D. 30，60
The first number required is: 17 × 2-1 = 33; the second number required is: 33 × 2-1 = 65; option a meets the requirements
1. A story book has 120 pages. On the first day, Xiao Hong read 1 / 6 of the whole book, and on the second day, she read the remaining 1 / 5. On the third day, what page should she read?
2. Two fifths of the number of chickens is the number of ducks, here () is regarded as "1"
A. Number of chickens B, number of ducks C, 2 / 5 d, total number of chickens and ducks
Hello, landlord
(1) 120 × (1 / 5 + 1 / 6) = 44 pages
A: we should start from page 45
(2) 2 / 5 of the number of chickens is the number of ducks, here (a, the number of chickens) as "1"
A. Number of chickens B, number of ducks C, 2 / 5 d, total number of chickens and ducks
Hope to help you, do not understand, please ask
The number of chickens as a unit 1
From city a to city B, it takes 10 hours for trucks and 8 hours for buses to complete the whole journey. When the buses leave city a two hours later, the trucks leave city B. how many hours did the trucks travel when they met
(1-1 / 8 × 2) / (1 / 10 + 1 / 8) = 3 and 1 / 3
That's 3:20
That's right this time