1. The fruit shop delivered X boxes of apples, each box 10 kg, and sold 75 kg, leaving 5 kg.
Equivalence relation:
Equation: =5
2. There are 45 Shui Xin Gardens. After giving the X picture to Doudou and Lele, there are 13 left.
Equivalence relation:
Equation: = 13
3. The rectangle is13m long, x m wide and 38m in circumference.
Equivalence relation:
Equation: =38
Xiaohua took 8 yuan to buy exercise books, each of which was 0.75 yuan. After buying X books, he found 3.5 yuan.
Equivalence relation:
Equation: =3.5
Second, solve the equation.
1. There are 350 poplars planted in the forest farm, 50 fewer than pine trees and 4 times as many as pine trees. How many pine trees are planted in the forest farm?
Grandpa is 76 years old, four years older than his grandson. How old is the grandson this year?
3. Little Wang Mai bought a pen and a ballpoint pen, which cost 7.86 yuan. This pen costs twice as much as a ballpoint pen. How much are pens and ballpoint pens?
A batch of fruits arrived from the market, among which apples are three times as heavy as pears. As we all know, apples are 270 kilograms heavier than pears. How many kilograms do apples and pears weigh?
5. The distance between Party A and Party B is 480 kilometers, and buses and trucks start from both places at the same time. It is known that the bus speed is 65 kilometers per hour and the truck speed is 55 kilometers per hour. How many hours did the two cars meet?
6. Dad bought brown sugar, sugar 1.5 Jin each, * * Fahua 1 1. 1 Yuan, and brown sugar per Jin is known in 3.2 yuan. How much is sugar per kilogram? (Answer in two ways)
7. There are three kinds of fruit trees in the orchard. Apple trees are three times as big as pear trees, and peach trees are 1.2 times as big as pear trees. How many pear trees are there?
8. The circumference of a rectangle is 360 meters, and its length is four times its width. What is the length and width of this rectangle?
9. The surface area of the earth is 565438+ 1 100 million square kilometers, of which the ocean area is about 2.4 times of the land area. How many billion square kilometers is the ocean area and land area on the earth?
10. There are two barrels of oil, and the weight of the second barrel is 1.5 times that of the first barrel. If you take out 2 kilograms from the second barrel and put it in the first barrel, the weight of the two barrels of oil is equal, how many kilograms does the first barrel have?