There are 20 rational number calculation questions in mathematics in the first year of junior high s

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Synchronous Syllabus Exercise] (45 minutes, full score of 100 points) 1 Calculation problem: (10 5 = 50).

2.Calculation problem: (10 5 = 50).

Quality Optimization Training].

1.Fill-in-the-blank questions:

1) If yes, then ac 0;If , then ac 0;

2) If , then abc= ; a2b2c2= ;

3) Knowing that a, b are inverse numbers to each other, c and d are reciprocal to each other, and the absolute value of x is equal to 2, then x2-(a+b)+cdx= .

2 Calculation: Practical application in life].

A buys a lot of ** for 1,000 yuan, and then he resells this lot of ** to B for a profit of 10%, and then B resells this lot of ** to A, but B loses 10%.In the end, A sold this lot of ** to B at a 10% discount of the ** sold by B to A, and in the above ** transaction ( ).

a A is just breakeven; b A profit of 1 yuan;

C A makes a profit of 9 yuan; d A loses money.

Quality Optimization Training].

1.(1)>，2)24，-576;(3) 2 or 6[hint: =2 x2=4,x= 2]. 2.(1)-31; (2)-8 (3)224

Practical application in life] b

(1) minus one-half minus 5 and one-fifth minus one; 3 and one-fifth minus one-third.

5 and 2/3

2) (3) 1 and a half) 2 out of 9 6 |Two-thirds |³

(minus 3) divided by one and a fifth minus (1 + half + one-third) divided by (minus seven and a third).

Minus 3 times 5/6 minus 1/6 times (minus 3/22) = minus 5/2 plus 1/4.

Nine-quarters of minus.

(1) minus one-half minus 5 and one-fifth minus one; 3 and one-fifth minus one-third.

5 has two-thirds.

3) 1 and a half) 2 out of 9 6 |Two-thirds |= minus twelve.

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9+[-23]+0+[-16]= 0 [-18]+29+[-52]+60= 19 [-3]+[2]+[1]+0+1+2= -3 [-301]+125+301+[-75]= 50 [-1]+[1 2]+3 4+[-1 4]= 1 [-7 2]+5 6+[ 8 3 (+1)+(20)-83 37=-21+9 37 =6-6 =0 (-3) (5)2=(-3) 25=-75 3) ( 5) 2=(15)2=225 3)2-(-6)=9-(-6)=9+6=15 (4 32)-(4 3)2 =(4 9)-(12)2 =-36-144 =-180 Mixed operation practice of rational numbers in mathematics for junior high school.

Synchronous Outline Exercises] (45 minutes, out of 100 points).

1 Calculation problem: (10 5=50).

2.Calculation problem: (10 5 = 50).

Quality Optimization Training].

1.Fill-in-the-blank questions:

1) If yes, then ac 0;If , then ac 0;

2) If , then abc= ; a2b2c2= ;

3) Knowing that a, b are inverse numbers to each other, c and d are reciprocal to each other, and the absolute value of x is equal to 2, then x2-(a+b)+cdx= .2 Calculations:

Practical application in life].

A buys a lot of ** for 1,000 yuan, and then he resells this lot of ** to B for a profit of 10%, and then B resells this lot of ** to A, but B loses 10%.In the end, A sold this lot of ** to B at a 10% discount of the ** sold by B to A, and in the above ** transaction ( ).

a A is just breakeven; b A profit of 1 yuan;

C A makes a profit of 9 yuan; d A loses money.

Quality Optimization Training].

1.(1)>，2)24，-576;(3) 2 or 6[hint: =2 x2=4,x= 2]. 2.(1)-31; (2)-8 (3)224

Practical application in life] b [Hope].

Are you satisfied with the above?

In the first year of junior high school, there are mixed arithmetic exercises for the rational number of the book of the book.

Synchronous Syllabus Exercise] (45 minutes, full score of 100 points) 1 Calculation problem: (10 5 = 50).

Qihong 1) 3 28-4 76+1

2.Calculation problem: (10 5 = 50).

Quality Optimization Training].

1.Fill-in-the-blank questions:

1) If yes. Well ac

0；If. Well ac

2) If. then abc=

a2b2c2=

3) Knowing that a, b are inverse numbers to each other, c and d are reciprocal to each other, and the absolute value of x is equal to 2, then x2-(a+b)+cdx=2 calculate:

Practical application in life].

A bought a lot of ** with 1,000 yuan, and then he resold the hand ** to B for a profit of 10%, and then B resold the hand ** to A, but took the hand B and lost 10%.In the end, A sold this lot of ** to B at a 10% discount of the ** sold by B to A, and in the above ** transaction ( ).

a A is just breakeven;

b A profit of 1 yuan;

C A makes a profit of 9 yuan;

d A loses money.

Quality Optimization Training].

x2=4，x=±2].

Practical application in life] b [Hope].

Are you satisfied with the above?

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Whether that number is -66 or -61, -61 is.