(Issuer * *) 2007.8

Name _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

First, see the topic clearly and think skillfully (***36 points)

(1) number written directly (12 points)

640÷80= 440÷22= 58×70+70×42=

9 10 ÷70= 400×2 1= 48×99=

900×70= 302= 125×(80×8)=

10x-9x = 120×80 = 12×5÷ 12×5 =

(2) Use vertical calculation. (6 points)

580×50= 304×45= 9 10÷90=

(3) Calculate the following questions. If it can be calculated simply, use simple calculation. (18)

490÷[2 10÷(750÷25) ] 27 1×24-24× 17 1

99+99×99 ( 84 1-4 1)÷25×4

325-20×5+25 (270+35×6)÷80

Second, think carefully and sit in the right position. (1 minute per grid, ***20 points)

1. Fill in the appropriate number in □ and the appropriate operation symbol in ○.

a×b-b×c=□ ○(□ ○ □)

99 + a×99=□ ×(□ ○ □)

2. cut off the largest square in the rectangle filled in > b), and the remaining graphic area is () square meters.

① b2 ② ab ③ (a-b)b

Draw a picture and fill it in. (*** 13)

1. Draw the height of the parallelogram first and then measure it. 2. Divide the parallelogram in two.

A trapezoid with exactly the same base and height (3 points). (2 points)

bottom

The bottom is () cm and the height is () cm.

3( 1) Translate the triangle in the figure below by 4 squares to the right, and then by 5 squares downward. (2 points)

(2) Rotate the trapezoid in the figure counterclockwise below 90 degrees along point A to draw the rotated figure. (2 points)

Draw a picture in the box above and fill in the blanks. (4 points)

A square with a side length of 1 cm and a circumference of 4 cm. Six such squares can be spliced into a rectangle, and the circumference of the spliced rectangle is () cm or () cm.

Fifth, solve practical problems. (***23 points, 6+6+6+5)

1, Xu Hao borrowed a story book with 120 pages and read 30 pages in 3 days. If the loan term is 8 days, from

On the fourth day, how many pages did he read on average every day?

2. A square experimental field, with a 4-meter-long land on its right, becomes a rectangular experimental field, with an area of 48 square meters more than the original. What is the area of the experimental field now?

The school is 2000 meters away from the Children's Palace. Xiaohong and Xiaojun walked from school to the Children's Palace at the same time. Xiaohong scored every point.

The clock walks 50 meters, and Xiaojun walks 80 meters per minute.

(1)15 minutes later, how many meters apart?

② When Xiaojun arrived at the Children's Palace, how many meters was Xiaohong from the Children's Palace?

4. Do you know?

In human infancy, the pulse beats about 65438 035 times/minute; At the age of 2, it is about 1 15 times/minute;

At the age of 5, it is about 97 times/minute; 10 years old, about 84 times/minute; /kloc-at the age of 0/4, it is about 72 times/minute.

According to the above data, make a broken line statistical chart and complete the following questions.

(1) What do you find is the relationship between the pulse changes within 14 years old and age?

(2) The pulse condition changes the most from () to () years old.

(3) The pulse rate is about 90 times per minute, and the age is about () years old.

(4) What other math questions can you ask? And answer.

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