First, the calculation problem

1, oral calculation (6 points)

0x27=、25x3x4=500x60=240x3=

30x 6 = 35x2x 5 = 12x 30 = 900 = 3 = 24x 5 = 19+ 12+38 = 1000-667 = 4x 12 =

2, column vertical calculation:

1 14x 27 = 406 x25 = 460 x 14 =

3. Use a simple method to calculate.

25x 125 x4x 837 x28+37 x2(20+8)x 125

173+428+2738 x 10 144 x25

Judging whether it is true or not (mark "√" correctly and "X" wrongly)

1, a straight line is 5 meters long. ()

2. Two parallel lines never intersect. ()

3. The longer the side of the angle, the bigger the angle. ()

An angle of 4.0 is as big as an angle of 360. ()

When two straight lines intersect at right angles, they are perpendicular to each other. ()

Third, the application problem.

1. Uncle Wang is opening fertilizer in the fertilizer plant. It took five hours to go at 48 kilometers per hour, and only three hours to come back empty. What was the average speed when I came back? What is the average speed of going back and forth?

2. The school will distribute exercise books to 8 classes, 200 for each class, and reserve 100 for awarding prizes. How many exercise books should schools buy?

3. The school canteen delivers coal 1 ton, and it is planned to burn for 40 days. Due to the improvement of the stove, 5 kilograms are saved every day. How many days can this batch of coal burn?

4. A binding team has to bind 2640 books, and 240 books have been bound in 3 hours. According to this calculation, how many hours will the remaining books be bound?

In the fourth grade, 244 books will be restored for the library. Repair 49 copies on the first day, 5 1 copy on the second day, and finish the rest three days. How many books will you repair on average every day?

6. The construction site needs 50 tons of yellow sand. It was transported five times by a car with a load of 4 tons, and the rest was transported by a car with a load of 5 tons. How many times will it be shipped?

7. Flowers 120 Buy a pot of flowers, 4 pots for free, and 25 pots for school. What is the lowest cost?