= 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