Unit 7

First, I can calculate.

1. Write directly.

1.67+0.33= 2.35-2.3= 0.25×4= 2 10÷0.7=

0.2×7.8×0.5= 6×0.4= 0. 125×8= 120×5=

5.4÷0.9= 9.3÷0.03= 0÷2. 1×6.5= 1÷0.2÷0.5=

2. Calculate the following questions.

0.75× 18÷0. 15 1.25×2.5+0.75×2.5 2 1.36÷0.8- 12.9

3. Solve the equation.

x-52 = 25 7x = 10.5 17-x = 6

9x-3x=78 7.2÷x=8 2x+x+5=32

13(x+5)= 169 5x-27 = 18(3x-7)÷5 = 16

Second, I'll fill it out.

1. Plant trees between two buildings with a distance of 100 meters, and plant () trees every 10 meters.

2. A road is 40 meters long, and a tree is planted every 8 meters on both sides of the road, and there are * * * trees on both sides.

3. Two willows are 408 meters apart, during which 23 young trees are planned to be replanted. If every two trees are equally spaced, then the spacing between the two trees will be () meters.

4. The circumference of the circular skating rink is 400 meters, and a lamp is installed every 20 meters. * * * should be equipped with a lamp.

5. Plant 86 telephone poles every 15 meters from beginning to end on one side of the boulevard. This boulevard is 20 meters long.

6. The big clock in the square strikes four times at four o'clock and once every six seconds. 12 hit 12, hit () seconds.

Third, I will judge (draw "√" and draw "×" wrongly).

1. Plant trees at one side and both ends of the path. The number of trees planted is more than the spacing 1. ( )

Plant trees on one side of the path, but not on both sides. The number of trees planted is more than the spacing 1. ( )

3. Plant trees at the edge of the circular pond with the same number of intervals as the trees. ( )

It takes 3 minutes for a piece of wood to saw 3 segments, and 4 segments can be sawed in 4 minutes. ( )

5. The three cards read 1, 1, 2 respectively. If you draw a card, there is a great possibility of drawing 1. ( )

Fourth, choose one.

1. A section of highway is 3600 meters long. Plant a Platanus acerifolia every 9 meters on both sides of the highway, and plant a Platanus acerifolia () at both ends.

400 B.40 1 C.800 D.802

2. If 157 poplar trees are planted equidistantly around a circular garden with a circumference of 628 meters, the distance between the two trees is () meters.

A.2 B.4 C.8 D. 12

3. A boulevard in the Red Scarf Park is 800 meters long. On its side, there are 465,438+0 trash cans at equal distance from the beginning to the end, and the distance between every two trash cans is () meters.

A.20b.19c.21d. cannot be determined.

There is a locust tree every 7 meters on both sides of the road. Fangfang took the tram for 3 minutes and saw 15 1 locust tree on one side of the road. The speed of the tram is () meters per minute.

A.50b. 150c.350d is uncertain.

Fifth, solve the problem.

1. The distance between the two buildings is 56 meters. How many cedars can be planted every 4 meters?

2. A circular pond is 300 meters in circumference. How many saplings does it take to plant a willow every 5 meters?

3. The school should insert a colorful flag every 5 meters on both sides of the 80-meter straight runway. How many colorful flags do you need if you don't plug one end?

A round fish pond is 200 meters long. Now 25 poplars are planted around the pond. How many meters can I plant?

Some billboards are newly installed every 4 meters on one side of a road, but they are not installed because one end is a pier. Xiaolan counted it from beginning to end and counted 42 billboards. How long is this road?

Students should plant 8 poplars between two buildings 72 meters apart. If you don't plant at both ends, what is the average distance between every two trees?

7. A person walks on the path at the same speed. It takes1min to walk from the first tree to the 12 tree. If this person walks for 25 minutes, which tree should he go to?

8. Eight people sit at one table, two tables together 12 people, three tables together 16 people. 10 How many people can sit in a row of tables? How many tables do 32 people need to get up to sit down?