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Twenty rational numbers mixed operation band process (first order)
20 rational numbers mixed operation and process (grade one), finding 40 rational numbers mixed operation, important process, thank you. First grade. . (1) 2 ÷ (-3/7) x7 4 ÷ (-5 and 1/7)

= 2×(7/3)×(4/7)×7/36

= 14/27

(2) 2/3 (-2 and 2/3)-2 1.4x (- 1 and 3/4)

= -2/3×3/8+4/2 1×7/3

=- 1/4+4/9

=7/36

(3)-2 1/2 1÷(- 10)x3 1/3 1÷(-5/6)

= -5/2× 1/ 10× 10/3×6/5

=- 1

(4) 2/3 (-2 and 2/3)-2 1.4x (- 1 and 3/4).

= Same as 2

(5)2 16 15 ÷ (-8 1)

=-47/ 16×8

= -47/2

(6)(-24)x( 1-3/4+ 1-5/8)

=-24+ 18-4+ 15

=5

Thirty rational numbers mixed operation belt flow-5+21* 8/2-6-59 68/21-8-1* 8+61-2/9-7/9. 3-4- 1/4 *(0.4)]/ 1/3+2 22+(-4)+(-2)+4 * 3-2 * 8-8 * 1/8(2/3+ 1/2)/(- 1/ 12)*(- 12)(-65438+28)

Please give the mixed operation problem of 20 rational numbers (1)23+(-73).

(2)(-84)+(-49)

(3)7+(-2.04)

(4)4.23+(-7.57) (5)(-7/3)+(-7/6)

(6)9/4+(-3/2) (7)3.75+(2.25)+5/4 (8)-3.75+(+5/4)+(- 1.5)

(2) Calculate by a simple method: (1) (-17/4)+(-10/3)+(+13)+(113).

(2)(-6.55)+4 -(-6.55)+(-8. 1)-(-8. 1); (3)

|0-5|-|(-4)-(+6)|-|(-7.5)+2-(+5.5)|; (3)(+33 )×(-0.25)×(-7)×(+4)×(-0.3); (4)- 13× 125- 13×2 16+(- 13)×(-30 1); [|-98|+76+(-87)]-23[56+(-75)-(7)]-(8+4+3) -(-89)+|-87|-23+[-75-(7)+76]-( 10+39-24) |-9.8|+(-4.6)-[8.7-(- 1.3)]+(-5.4)-(-0.2) [-(-84)+46] -| -9. 1|+(+ 1.9) [-(-90)+(-34)]-(+43)+(-57)+ 10 5+2 1+8/2-6-59

Rational number addition and subtraction mixed operation and process solution: 0.5+(-1/4)-(-2.75)+1/2.

The original formula = 0.5-1/4+2.75+1/2.

=0.5+ 1/2+2.75- 1/4

= 1+2.5

=3.5

Solution: (-2/3)+(-1/6)-(-1/4)-(-1/2)+0.

The original formula =-2/3-1/6+1/4+1/2+0.

=-5/6+3/4+0

= 19/ 12

Check the correct answer by yourself. I'm also a junior.

First rational number mixed operation, writing process 1,

=9-(-3/2)*2/3 +(-6)/(- 12/5)

=9+3/2*2/9+6*5/ 12

=9+ 1/3+5/2

=89/6 or 14 and 6/5

2,

=25*(-6)- 12/[(-3)+(-5)]

=(- 150)- 12/(-8)

=(- 150)+3/2

=297/2 or 148+0/2.

There are mixed operations of adding and subtracting ten rational numbers in the first grade, so you don't have to use them.

[-|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

There is a process solution for the addition and subtraction of rational numbers: (1) (-1/3)-15+(-2/3).

=[( - 1/3)+( - 2/3)] - 15

=( - 1) - 15

= - 16.

(2) ( - 12) - ( - 5/6)+( - 8) - 7/ 10

= - 12+5/6 - 8 - 7/ 10

=( - 12 - 8)+(25/30 - 2 1/30)

= - 20+2/ 15

=- 19 and 15 points 13.

50 rational number addition and subtraction mixed operation with process, kneel down! [-|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

Ten questions of rational number multiplication in the first grade of senior one mathematics: 1. (- 100)x(-20)x(-5)= 2000 x(-5)=- 10000。

2.(0.7)x (negative 1 3/5) =-28/25

3.(-2)x(- 1/2)x(-3)=-3

4.(- 1/2)x6=-3

5.(- 152)x0x(-2 1)=0

6.(- 1/2)x(- 1/3)= 1/6

7.(3/ 10)x(- 1/4)=-3/40

8.-24x( 1/3)x(-7/ 12)= 7/6

9.-0.32 x(-4.58)-0.68 x(-4.58)=(-4.58)x[(-0.32)+(-0.68)]=(-4.58)x(- 1)= 4.58

10.[(3/ 10)-( 1/2)+( 1/5)-0. 1]x(- 10)=(3/ 10)x(- 1/2)-x(- 10)+( 1/5)x(- 10)-0