Rational number 100 mixed operation exercises and answers. Thank you. They are all students. They are from the same root. Why are you in such a hurry? Plus points!

2.( 103-336÷2 1)× 15

3.800-(2000-9600÷8)

4.40×48-( 1472+328)÷5

5.(488+344)÷(202- 194)

6.2940÷28+ 136×7

7.605×(500-494)- 1898

8.(2886+66 18)÷(400-346)

9.9 125-( 182+35×22)

10.( 154-76)×(38+49)

1 1.3800- 136×9-798

12.( 104+246)×(98÷7)

13.9 18÷9×( 108-99)

14.(8645+40×40)÷5

15.(2944+864)÷( 1 13-79)

16.8080- 1877+ 188 1÷3

17.(50 1 1-43×85)+3397

18.2300- 1 122÷(2 1- 15)

19.8 16÷(4526-25 1× 18)

20.(7353+927)÷(80 1-792)

2 1.(28+ 172)÷(24+ 16)

22.6240÷48+63×48

23.950-28×6+666

24.86×(35+ 1 17÷9)

25.2500+(360- 160÷4)

26. 16×4+6×3

27.39÷3+48÷6

28.24×4-42÷3

29.7×6- 12×3

30.56÷4+72÷8

Application questions:

1. Mom bought 3 kilograms of broccoli. She paid 5 yuan and got 0.5 yuan back. How much is cauliflower per kilogram?

2.5 1 class has 50 story books, twice as many as 4 art books. How many art books are there?

3. A triangular plot with an area of 280 square meters, a bottom of 80 meters and a height of several meters?

4. The area of a trapezoid is 450 square meters, the height is 30 meters, the upper bottom is 15 meters, and the lower bottom is how many meters?

There are 80 sheep on the hillside, among which the number of white sheep is four times that of black sheep. How many black sheep and white sheep are there on the hillside?

6. Two baskets of oranges were sold in the shop. The first basket weighs 26 kilograms and the second basket weighs 29 kilograms. The second basket sold 9 yuan more than the first one. What is the average price of oranges?

7. A trapezoidal wheat field with an area of 540m2, a height of18m, an upper bottom of 20m and a lower bottom of several metres?

8. Two cars, A and B, leave from two places 750 kilometers apart at the same time, face to face, and meet in five hours. Car A travels 80 kilometers per hour, and how many kilometers does car B travel per hour?

9. Two cars leave from the same place at the same time. After driving for 4.5 hours, car A lags behind car B 13.5 km. It is known that car A travels 35 kilometers per hour. How many kilometers does bus B travel per hour?

10, processing a batch of parts, with the cooperation of Party A and Party B for 5 hours, and Party A making 9 forms independently. It is known that A processes 2 more parts per hour than B. How many parts are there in this batch?

1 1, the stadium bought 16 basketball and 12 football, and * * * paid 760 yuan. It is known that the unit price ratio of basketball and football is 5: 6. How much does the stadium pay for basketball and football?

12. A store bought a batch of leather sandals, and the price of each pair was higher than the purchase price 15%. If you sell them all, you can make a profit 120 yuan; If you only sell 80 pairs, you can't go to 64 yuan. What is the purchase price of leather sandals?

13. Master Zhang will make a cylinder with two pieces of iron sheets (see the picture below), choose one of them to cut out two bottoms, and then use the other piece as the edge. The volume of the cylinder is required to be as large as possible, so what is the surface area of the cylinder made by Master Zhang? What is the volume? (regardless of the joint, π is φ 14)

14, A walks from Dongcheng to Xicheng at 5 kilometers per hour, and B walks from Xicheng to Dongcheng at 4 kilometers per hour. If B goes before A at 1, then they meet right in the middle of the two cities. What's the distance between east and west?

15, an operating company has two warehouses to store color TV sets, and the storage ratio of warehouse A and warehouse B is 7: 3. If 30 sets are transferred from warehouse A to warehouse B, the ratio of warehouse A to warehouse B is 3: 2. How many TV sets were originally stored in these two warehouses?

16. When the express train from city A to city B needs 10, and the slow train from city B to city A needs 15, two cars leave from two cities at the same time. When they met, the express train ran more than the local train 120 km. How many kilometers are the two cities apart?

17, 5 tractors for 24 days 12000 mu. /kloc-how many tractors do you need to plow 54000 mu in 0/8 days?

18, square banana garden, side length 84m, banana trees spacing 2m, row spacing 8m. If each banana tree receives 65 kilograms of banana fruit at 0.45 yuan per kilogram, how much can this banana garden earn a year?

19, the transportation rate of Dongfeng brand trucks is 2.5 times that of tractors, and the transportation rate of large container trucks is Dongfeng brand trucks.

Triple, there is a pile of goods, transported by Dongfeng truck for six hours. If tractors are used to transport half of them,

How many hours does it take to transport the other half in a big truck?

20. Both parties sell eggs. Party A has more eggs than Party B 10, but the income after all eggs is 15 yuan. If Party A sells eggs at Party B's price, they can be sold to 18 yuan. How many eggs do Party A and Party B have?

[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)

5+2 1*8/2-6-59

68/2 1-8- 1 1*8+6 1

-2/9-7/9-56

4.6-(-3/4+ 1.6-4-3/4)

1/2+3+5/6-7/ 12

[2/3-4- 1/4*(-0.4)]/ 1/3+2

22+(-4)+(-2)+4*3

-2*8-8* 1/2+8/ 1/8

(2/3+ 1/2)/(- 1/ 12)*(- 12)

(-28)/(-6+4)+(- 1)

2/(-2)+0/7-(-8)*(-2)

( 1/4-5/6+ 1/3+2/3)/ 1/2

18-6/(-3)*(-2)

(5+3/8*8/30/(-2)-3

(-84)/2*(-3)/(-6)

1/2*(-4/ 15)/2/3

-3x+2y-5x-7y

Mixed operation of rational number addition and subtraction

Synchronous outline exercise

1. Multiple choice question:

(1) Write -2-(+3)-(-5)+(-4)+(+3) in the form of omitting brackets, and the correct one is ().

A.-2-3-5-4+3 B.-2+3+5-4+3

C.-2-3+5-4+3 D.-2-3-5+4+3

(2) The result of calculating (-5)-(+3)+(-9)-(-7)+ is correct ().

A.- 10 B.-9 C.8 D.-23

(3) The algebraic sum of-7,-12 and +2 is less than the sum of their absolute values ()

A.-38 B- 4 c . 4d . 38

(4) If +(b+3)2=0, the value of b-a- is ().

A.-4 B.-2 C.- 1 D. 1

(5) The following statement is true ()

A. the subtraction of two negative numbers is equal to the subtraction of absolute values.

B the difference between two negative numbers must be greater than zero.

C. A positive number minus a negative number is actually the algebraic sum of two positive numbers.

D. negative negative positive equals the absolute value of negative plus positive.

(6) Equation -3-5 cannot be read as ()

The difference between A.-3 and 5. The sum of b. 3 and -5.

Difference between c-3 and -5d-3 minus 5

2. Fill in the blanks: (4 ′× 4 =16 ′)

( 1)-4+7-9=- - + ;

(2)6- 1 1+4+2=- + - + ;

(3)(-5)+(+8)-(+2)-(-3)= + - + ;

(4)5-(-3 )-(+7)-2 =5+ - - + - .

3. Write the following form in sum form, without brackets, and say two pronunciation methods: (8 ′× 2 =16 ′)

( 1)(-2 1)+(+ 16)-(- 13)-(+7)+(-6);

(2)-2 -(- )+(-0.5)+(+2)-(+ )-2.

4. Calculation problem (6 ′× 4 = 24 ′)

( 1)- 1+2-3+4-5+6-7;

(2)-50-28+(-24)-(-22);

(3)- 19.8-(-20.3)-(+20.2)- 10.8;

(4)0.25- +(- 1 )-(+3 ).

5. When x =-3.7, y =- 1.8 and z =- 1.5, find the value of the following algebraic expression (5 ′× 4 = 20 ′).

( 1)x+y-z； (2)-x-y+z； (3)-x+y+z； (4)x-y-z。

Quality optimization training

( 1) (-7)-(+5)+(+3)-(-9)=-7 5 3 9;

(2)-(+2 )-(- 1 )-(+3 )+(- )

=( 2 )+( 1 )+( 3 )+( );

(3)- 14 5 (-3)=- 12;

(4)- 12 (-7) (-5) (-6)=- 16;

(5)b-a-(+c)+(-d)= a b c d；

2. When x=, y=- and z=- respectively, find the values of the following algebraic expressions;

( 1)x-(-y)+(-z)； (2)x+(-y)-(+z)；

(3)-(x)-y+z； (4)-x-(-y)+z。

3. Verify the equations of the following three groups of numbers:

Is it true that a-(b-c+d)=a-b+c-d?

( 1)a=-2，b=- 1，c=3，d = 5；

(2)a=23，b=-8，c=- 1，d= 1。

Computational problem

( 1)- 1-23.33-(+76.76);

(2) 1-2*2*2*2;

(3)(-6-24.3)-(- 12+9. 1)+(0-2. 1);

(4)- 1+8-7

Practical application of life

A water conservancy survey team swam 5 kilometers on the first day, 5 kilometers on the second day, 4 kilometers on the third day and 4.5 kilometers on the fourth day. Where is the survey team at this time? How many kilometers apart?

Reference answer:

Synchronous outline exercise

1.( 1)C； (2)B； (3)D； (4) a; (5)C； (6)C 2。 ( 1)4,(-7),(-9) (2)(-6),(- 1 1),(-4),2; (3)-5,8,2,3; (4)3,7,2;

3. Omit 4. ( 1)-4; (2)-80; (3)-30.5 (4)-5

5.( 1)-4; (2)4; (3)0.4; (4)-0.4.

Quality optimization training

1.( 1)-,+,+; (2)-,+,-,-; (3)+,+; (4)-,+,+; (5)-,+,-,-.

2.( 1) (2) (3) (4)-

3.( 1) and (2) both hold.

4.( 1)-

(2)

(3)-29.5

(4)- 1 Question (4) Note that the numbers with the same sign and the opposite sign should be combined separately.