1. Master Wang processed part B, and the qualified rate was 98%. There are (0.98b) qualified parts and (0.02b) unqualified parts.
2. Large trucks transport 14 tons at a time, and small trucks transport 9 tons at a time. After a batch of goods was transported m times by the big truck, the small truck was transported n times, and it was just finished. The cargo is (14m+9n) tons.
3. Three consecutive odd numbers, the middle number is m, and the other two numbers are (m-2) and (m+2) respectively.
4. When the unknowns X=0.25 and y= 1.4, the value of 3x-0.42 is (0.33) and the value of 8xy+y is (4.2).
5. The number A is the number B 13/ 15. If the number A is a, then the number B is (a15/13); If b is a, then a is (a 13/ 15).
6. A cylindrical container is filled with water, and the bottom radius is R. When a copper cone is completely immersed in water (water does not overflow), the water level rises by h, and the volume of this copper cone is (∏rrh).
Second, according to the following conditions, the equation is listed and solved. (Each step must be very detailed)
1/5 of 65438. X is more than 40% of 7 to 60.
( 1/5)x-40%*60=7
x= 165
The quotient obtained by dividing 2.85 by the reciprocal of 3/5 is more than that of x 14. ..
85/(5/3)-X= 14
X=37
3. Multiply 9 of x by the product of 12 and 6, and the sum is 2 16.
9X+ 12*6=2 16
X= 16
4.6 times of x is more than x 10.8.
4.6X-X= 10.8
X=3
Third, solve the problem: (to solve the equation, there must be a solution, the steps should be detailed, and there must be an answer)
1.A and B, riding an electric car from two places 98 kilometers apart at the same time, and walking in the opposite direction. They met two hours later. A travels 24 kilometers per hour, and B travels how many kilometers per hour?
98/2-24 = 25km
2. The volume of cylinder and cone is the same, which is 28.26 cubic decimeter. It is known that the radius of the cylinder bottom and the height of the cone are 1 decimeter. What is the area of the cone bottom? What is the height of the cylinder in decimeters?
The area of the cone base is 28.26*3/ 1=84.78 (square decimeter).
The height of the cylinder is 1/3 (decimeter).
3. China implements the system of voluntary blood donation, and each person donates 400 ml of blood each time. Citizens in a certain place donate 20,000 liters of blood every month. How many citizens have participated in voluntary blood donation?
20000/0.4=50000=5 (ten thousand people)
The price of a motorcycle is 3,500 yuan, six times that of a bicycle. 140 yuan. What is the price of a motorcycle?
It should be the price of bicycle: (3500- 140)/6=560 (RMB)
5. The distance between A and B is1380km. A train leaves from A to B at 5: 30 pm. The train runs at an average speed of 60 kilometers per hour. What time does the train arrive in B?
1380/60=23 (hours) 5: 30 +23=28: 30, which is 4: 30 pm the next day.
6. The kindergarten bought 25 ping-pong balls and 4 badminton balls and gave them to 46 yuan. It is known that every table tennis 1.6 yuan. How much is each badminton?
(46- 1.6*25)/4= 1.5 (yuan)