Seventh grade math final examination paper

The seventh grade math final exam is coming. Next, I will share with you some final examination papers for seventh grade mathematics. Come and enjoy with me.

Fill in the blanks (4 points for each small question, 40 points for * * *)

1. If the sum of the four numbers A, B, C and D is equal to -90, A is -4, B is +4, C is multiplied by -4, and D is divided by -4, then the largest one among the four numbers is greater than the smallest one.

2. Calculation (-2124+7113? 24 1 13 -38 )? 15 12 =___。

3. If sum is known to be similar, then = _ _.

4. The position of rational number on the number axis is shown in figure 1, which is simplified.

5. A class of students go to take part in voluntary labor. A group of people went to the orchard to pick pears. The first student who entered the garden picked/kloc-0 pears, the second student picked 2 pears, the third student picked 3 pears, and so on. Later students all picked 1 pear more than the previous students, so it happened that each student picked 6 pears on average. What is the number of this group of students?

6. Xiaoming rode his bike from A to B, going uphill first and then downhill. It took him 34 minutes to return to A * * * immediately after arriving at B. Knowing that the uphill speed is 400 meters/minute and the downhill speed is 450 meters/minute, the distance from A to B is _ _ meters.

7. When the school holds a sports meeting, the monitor will buy soda for 50 teachers and students in the class in batches. Every empty bottle is 5 according to the store rules.

If empty bottles can be replaced with soda, you should buy at least one soda and make sure everyone drinks one soda.

8. There is such a simple algorithm to measure whether the weight is normal or not. The standard weight of boys (in kilograms) is the height (in centimeters) minus 1 10. The normal weight is between the standard weight loss 10% and the standard weight increase 10. It is known that student A is tall 16 1 cm and weighs W. If his weight is normal, the range of W's kilograms is _ _ _ _.

9.m, N and L are two-dimensional positive buildings. Given that their minimum common multiple is 385, the maximum value of m+n+l is _ _.

10. When x=5, the algebraic expression ax +bx-5 is 10 and x=-5, the algebraic expression ax +bx+5=__.

Second, multiple-choice questions (5 points for each small question, 30 points for * * *)

The negative reciprocal of the reciprocal of 1. -|-3| Yes ()

(A) 13(B) 13(C)-3(D)3

2. As shown in Figure 2, AE=B=BF= AD= AB=2 in rectangular ABCD.

E, H and G are on the same straight line, then the area of the shaded part is equal to ().

(A)8。 (B) 12。 (C) 16。 (D)20。

3 3. 10/October 1 day, Xiao Ming counted that the average age of everyone is just 38 years old. Grandpa said that these people also got together on October 1st two years ago, so the average age when they got together two years ago was () years old.

38 (B)37 (C)36 (D)35

In order to reach the destination, the expedition needed to take a boat upstream and accidentally dropped the map into the water. Someone found that the ship immediately turned around and chased the map. It is understood that it took the ship five minutes to turn around and catch up with the map. So, the man found that the map fell into the water ().

(a)4 minutes later, (b)5 minutes later, (c)6 minutes later and (d)7 minutes later.

5. In the autumn sports meeting, MengMeng, Lu Jia and Wang Yu of Class 7 (1) run 100 meters together (assuming three people).

If MengMeng arrives at the finish line, Lu Jia is meters away from the finish line, then Wang Yu is meters away from the finish line.

M (short for meter)) So when Lu Jia reached the finish line, Wang Yu was still ().

Not sure.

6. known a? 2，b？ -3，c？ 5, and a-b+c= 10, then the value of a+b+c is equal to ().

10 (B)8 (C)6 (D)4

Third, solve the problem (each small question 10, ***30)

1. For a wooden stick with a length of 1 m, cut 12 of the total length for the first time, 13 of the remaining length for the second time, 14 of the remaining length after the second cut for the third time, and the first (n-/kloc-0) If * * * intercepts 2007 times continuously, how many meters will it intercept?

Between 5 o'clock and 6 o'clock, someone looked at his watch. He accidentally took the hour hand as the minute hand, which led him to see the time 57 minutes earlier than the correct time. When is the correct time?

3. As winter approaches, three shopping malls, A, B and C, take different promotion measures for the sales of down jackets in order to compete for the market. For a down jacket with a price of RMB, the sales method of shopping mall A is to buy it for free, the sales method of shopping mall B is to sell it at a discount, and the sales method of shopping mall C is to buy enough down jackets at a discount. If you have RMB now, which mall do you think has the highest cost performance? State your reasons.

The seventh grade mathematics final examination paper refers to the answer.

I. 1.204 2。 -.32 3.-8 4.-2 5. 1 1 6.7200 7.40 8.45.9 ~ 56. 1 9. 167 1.

Ii. 1. A2.B3.C4.b5.c6.d

Three. 1.20072008 2.5: 24

3.( 1) 300? 8=2400 (yuan)

(2) 2700? 8.5=2295 (yuan)

(3)300? 10? 0.8=2400 (yuan)

8.5? 300=280 (yuan)

2400-280=2 120 (yuan)

So it's most cost-effective to go to store C.

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