本文作者:2021

实数计算题资料|初一实数计算题100道

2021 2021-01-19 53
实数计算题资料|初一实数计算题100道摘要: 给我20道实数混合运算题(1)(-9)-(-13)+(-20)+(-2)(2)3+13-(-7)/6(3)(-2)-8-14-13(4)(-7)*(-1)/7+8(5)(-11)*...

给我20道实数混合运算题


(1) (-9)-(-13)+(-20)+(-2)
(2) 3+13-(-7)/6
(3) (-2)-8-14-13
(4) (-7)*(-1)/7+8
(5) (-11)*4-(-18)/18
(6) 4+(-11)-1/(-3)
(7) (-17)-6-16/(-18)
(8) 5/7+(-1)-(-8)
(9) (-1)*(-1)+15+1
(10) 3-(-5)*3/(-15)
(11) 6*(-14)-(-14)+(-13)
(12) (-15)*(-13)-(-17)-(-4)
(13) (-20)/13/(-7)+11
(14) 8+(-1)/7+(-4)
(15) (-13)-(-9)*16*(-12)
(16) (-1)+4*19+(-2)
(17) (-17)*(-9)-20+(-6)
(18) (-5)/12-(-16)*(-15)
(19) (-3)-13*(-5)*13
(20) 5+(-7)+17-10

1 -18
2 -76
3 -37
4 9
5 -43
6 -(20/3)
7 -(199/9)
8 54/7
9 17
10 2
11 -83
12 216
13 1021/91
14 27/7
15 -1741
16 73
17 127
18 -(2885/12)
19 842
20 5

实数的计算题


http://www.bjkyfz.com/XKWZ/UploadFiles_4922/200608/20060827193035410.doc 

一、判断题(对的在括号里打“√”,错的打“×”)

1. 因为3的平方等于9,所以9的平方根是3. ( )

2. (-2)2的算术平方根是2 ( )

3. 实数a的算术平方根一定是非负数 ( )

4. 负数没有平方根,也没有立方根 ( )

5. 一个数的平方根是这个数本身,那么这个数是0或1 ( )

6. 无限小数是无理数 ( )

7. 无理数与无理数的和是无理数 ( )

8. 数轴上的所有点都对应着有理数 ( )

9. 因为3.14是有理数,所以π是有理数 ( )

⒑一个数的平方根是这个数本身,那么这个数是0或1 ( )

二、填空题

1. 0.09的平方根是_________,算术平方根是__________.

2.

3. 的平方根是_________。

4. 0.512的立方根是_______, 是_______的立方根。

5. 当x________时, 在实数范围内有意义。

6.

7.

8.

三、选择题

1.在实数范围内,数0,7,-81,(-5)2中,有平方根的有 [ ]

A.1个; B.2个;

C.3个; D.4个.

2. a,b是两个实数,在数轴上的位置如图10-1所示,下面正确的命题是 [ ]

A.a与b互为相反数; B.a+b<0;

C.-a<0; D.b-a<0.

3. ( )

A. B.

C. D.一切实数

4. 下列说法正确的是 [ ]

B.(-5)2的算术平方根是-5

C.负数没有立方根

5. 的平方根是[ ]

A. B.-4 C. D.2

四、求下列各数的平方根

五、求下列各数的立方根

六、求下列各式中x的值

1. 2x2-10=0 2. x2+49=0

http://maths.guangztr.edu.cn/Soft/sj/chuyi/200509/4494.html

http://www.baidu.com/s?wd=%CA%B5%CA%FD%B2%E2%CA%D4%CC%E2&lm=0&si=&rn=10&ie=gb2312&ct=0&cl=3&f=1&rsp=8

初二实数100道计算题。纯计算。


(1)x^2-9x+8=0 答案:x1=8 x2=1

(2)x^2+6x-27=0 答案:x1=3 x2=-9

(3)x^2-2x-80=0 答案:x1=-8 x2=10

(4)x^2+10x-200=0 答案:x1=-20 x2=10

(5)x^2-20x+96=0 答案:x1=12 x2=8

(6)x^2+23x+76=0 答案:x1=-19 x2=-4

(7)x^2-25x+154=0 答案:x1=14 x2=11

(8)x^2-12x-108=0 答案:x1=-6 x2=18

(9)x^2+4x-252=0 答案:x1=14 x2=-18

(10)x^2-11x-102=0 答案:x1=17 x2=-6

(11)x^2+15x-54=0 答案:x1=-18 x2=3

(12)x^2+11x+18=0 答案:x1=-2 x2=-9

(13)x^2-9x+20=0 答案:x1=4 x2=5

(14)x^2+19x+90=0 答案:x1=-10 x2=-9

(15)x^2-25x+156=0 答案:x1=13 x2=12

(16)x^2-22x+57=0 答案:x1=3 x2=19

(17)x^2-5x-176=0 答案:x1=16 x2=-11

(18)x^2-26x+133=0 答案:x1=7 x2=19

(19)x^2+10x-11=0 答案:x1=-11 x2=1

(20)x^2-3x-304=0 答案:x1=-16 x2=19

(21)x^2+13x-140=0 答案:x1=7 x2=-20

(22)x^2+13x-48=0 答案:x1=3 x2=-16

(23)x^2+5x-176=0 答案:x1=-16 x2=11

(24)x^2+28x+171=0 答案:x1=-9 x2=-19

(25)x^2+14x+45=0 答案:x1=-9 x2=-5

(26)x^2-9x-136=0 答案:x1=-8 x2=17

(27)x^2-15x-76=0 答案:x1=19 x2=-4

(28)x^2+23x+126=0 答案:x1=-9 x2=-14

(29)x^2+9x-70=0 答案:x1=-14 x2=5

(30)x^2-1x-56=0 答案:x1=8 x2=-7

(31)x^2+7x-60=0 答案:x1=5 x2=-12

(32)x^2+10x-39=0 答案:x1=-13 x2=3

(33)x^2+19x+34=0 答案:x1=-17 x2=-2

(34)x^2-6x-160=0 答案:x1=16 x2=-10

(35)x^2-6x-55=0 答案:x1=11 x2=-5

(36)x^2-7x-144=0 答案:x1=-9 x2=16

(37)x^2+20x+51=0 答案:x1=-3 x2=-17

(38)x^2-9x+14=0 答案:x1=2 x2=7

(39)x^2-29x+208=0 答案:x1=16 x2=13

(40)x^2+19x-20=0 答案:x1=-20 x2=1

(41)x^2-13x-48=0 答案:x1=16 x2=-3

(42)x^2+10x+24=0 答案:x1=-6 x2=-4

(43)x^2+28x+180=0 答案:x1=-10 x2=-18

(44)x^2-8x-209=0 答案:x1=-11 x2=19

(45)x^2+23x+90=0 答案:x1=-18 x2=-5

(46)x^2+7x+6=0 答案:x1=-6 x2=-1

(47)x^2+16x+28=0 答案:x1=-14 x2=-2

(48)x^2+5x-50=0 答案:x1=-10 x2=5

(49)x^2+13x-14=0 答案:x1=1 x2=-14

(50)x^2-23x+102=0 答案:x1=17 x2=6

(51)x^2+5x-176=0 答案:x1=-16 x2=11

(52)x^2-8x-20=0 答案:x1=-2 x2=10

(53)x^2-16x+39=0 答案:x1=3 x2=13

(54)x^2+32x+240=0 答案:x1=-20 x2=-12

(55)x^2+34x+288=0 答案:x1=-18 x2=-16

(56)x^2+22x+105=0 答案:x1=-7 x2=-15

(57)x^2+19x-20=0 答案:x1=-20 x2=1

(58)x^2-7x+6=0 答案:x1=6 x2=1

(59)x^2+4x-221=0 答案:x1=13 x2=-17

(60)x^2+6x-91=0 答案:x1=-13 x2=7

(61)x^2+8x+12=0 答案:x1=-2 x2=-6

(62)x^2+7x-120=0 答案:x1=-15 x2=8

(63)x^2-18x+17=0 答案:x1=17 x2=1

(64)x^2+7x-170=0 答案:x1=-17 x2=10

(65)x^2+6x+8=0 答案:x1=-4 x2=-2

(66)x^2+13x+12=0 答案:x1=-1 x2=-12

(67)x^2+24x+119=0 答案:x1=-7 x2=-17

(68)x^2+11x-42=0 答案:x1=3 x2=-14

(69)x^20x-289=0 答案:x1=17 x2=-17

(70)x^2+13x+30=0 答案:x1=-3 x2=-10

(71)x^2-24x+140=0 答案:x1=14 x2=10

(72)x^2+4x-60=0 答案:x1=-10 x2=6

(73)x^2+27x+170=0 答案:x1=-10 x2=-17

(74)x^2+27x+152=0 答案:x1=-19 x2=-8

(75)x^2-2x-99=0 答案:x1=11 x2=-9

(76)x^2+12x+11=0 答案:x1=-11 x2=-1

(77)x^2+17x+70=0 答案:x1=-10 x2=-7

(78)x^2+20x+19=0 答案:x1=-19 x2=-1

(79)x^2-2x-168=0 答案:x1=-12 x2=14

(80)x^2-13x+30=0 答案:x1=3 x2=10

(81)x^2-10x-119=0 答案:x1=17 x2=-7

(82)x^2+16x-17=0 答案:x1=1 x2=-17

(83)x^2-1x-20=0 答案:x1=5 x2=-4

(84)x^2-2x-288=0 答案:x1=18 x2=-16

(85)x^2-20x+64=0 答案:x1=16 x2=4

(86)x^2+22x+105=0 答案:x1=-7 x2=-15

(87)x^2+13x+12=0 答案:x1=-1 x2=-12

(88)x^2-4x-285=0 答案:x1=19 x2=-15

(89)x^2+26x+133=0 答案:x1=-19 x2=-7

(90)x^2-17x+16=0 答案:x1=1 x2=16

(91)x^2+3x-4=0 答案:x1=1 x2=-4

(92)x^2-14x+48=0 答案:x1=6 x2=8

(93)x^2-12x-133=0 答案:x1=19 x2=-7

(94)x^2+5x+4=0 答案:x1=-1 x2=-4

(95)x^2+6x-91=0 答案:x1=7 x2=-13

(96)x^2+3x-4=0 答案:x1=-4 x2=1

(97)x^2-13x+12=0 答案:x1=12 x2=1

(98)x^2+7x-44=0 答案:x1=-11 x2=4

(99)x^2-6x-7=0 答案:x1=-1 x2=7

(100)x^2-9x-90=0 答案:x1=15 x2=-6

(101)x^2+17x+72=0 答案:x1=-8 x2=-9

(102)x^2+13x-14=0 答案:x1=-14 x2=1

(103)x^2+9x-36=0 答案:x1=-12 x2=3

(104)x^2-9x-90=0 答案:x1=-6 x2=15

(105)x^2+14x+13=0 答案:x1=-1 x2=-13

(106)x^2-16x+63=0 答案:x1=7 x2=9

(107)x^2-15x+44=0 答案:x1=4 x2=11

(108)x^2+2x-168=0 答案:x1=-14 x2=12

(109)x^2-6x-216=0 答案:x1=-12 x2=18

(110)x^2-6x-55=0 答案:x1=11 x2=-5

(111)x^2+18x+32=0 答案:x1=-2 x2=-16

实数计算题30道不要太难要过程谢谢


32.52-(6+9.728÷3.2)×2.5

5.

x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2

=[x(y+z)-y(x-z)]^2

=(xz+yz)^2

=z^2(x+y)^2

6.

3(a+2)^2+28(a+2)-20

=[3(a+2)-2][(a+2)+10]

=(3a+4)(a+12)

7.

(a+b)^2-(b-c)^2+a^2-c^2

=(a+b)^2-c^2+a^2-(b-c)^2

=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)

=(a+b-c)(a+b+c+a-b+c)

=2(a+b-c)(a+c)

8.

x(x+1)(x^2+x-1)-2

=(x^2+x)(x^2+x-1)-2

=(x^2+x)^2-(x^2+x)-2

=(x^2+x-2)(x^2+x+1)

=(x+2)(x-1)(x^2+x+1)

9.

9x^2(x-1)^2-3(x^2-x)-56

=9x^2(x-1)^2-3x(x-1)-56

=[3x(x-1)-8][3x(x-1)+7]

=(3x^2-3x-8)(3x^2-3x+7)

有理数练习

练习一(B级)

(一)计算题:

(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)

5.

x^2(y+z)^2-2xy(x-z)(y+z)+y^2(x-z)^2

=[x(y+z)-y(x-z)]^2

=(xz+yz)^2

=z^2(x+y)^2

6.

3(a+2)^2+28(a+2)-20

=[3(a+2)-2][(a+2)+10]

=(3a+4)(a+12)

7.

(a+b)^2-(b-c)^2+a^2-c^2

=(a+b)^2-c^2+a^2-(b-c)^2

=(a+b+c)(a+b-c)+(a+b-c)(a-b+c)

=(a+b-c)(a+b+c+a-b+c)

=2(a+b-c)(a+c)

8.

x(x+1)(x^2+x-1)-2

=(x^2+x)(x^2+x-1)-2

=(x^2+x)^2-(x^2+x)-2

=(x^2+x-2)(x^2+x+1)

=(x+2)(x-1)(x^2+x+1)

9.

9x^2(x-1)^2-3(x^2-x)-56

=9x^2(x-1)^2-3x(x-1)-56

=[3x(x-1)-8][3x(x-1)+7]

=(3x^2-3x-8)(3x^2-3x+7)

(二)用简便方法计算:

(1)(-17/4)+(-10/3)+(+13/3)+(11/3) (2)(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)

(三)已知:X=+17(3/4),Y=-9(5/11),Z=-2.25,

求:(-X)+(-Y)+Z的值

(四)用">","0,则a-ba (C)若ba (D)若a<0,ba

-38)+52+118+(-62)=

(-32)+68+(-29)+(-68)=

(-21)+251+21+(-151)=

12+35+(-23)+0=

利用有理数的加法解下面2题

(1)王老伯上街时带有现金550元,购物用去260元,又去银行取款150元,现在王老伯身上还有多少现金?

(2)潜水艇原停在海面下800米处,先浮上150米,又下潜200米,这时潜水艇在海面下多少米处?

(-6)+8+(-4)+12

3又1/4+(-2又3/5)+5又3/4+(-8又2/5)

9+(-7)+10+(-3)+(-9)

27+(-26)+33+(-27)

(+4又5/8)+(-3.257)+(-4.625)

23+(-17)+6+(-22)

-2+3+1+(-3)+2+(-4)

23+(-73)

(-84)+(-49)

7+(-2.04)

4.23+(-7.57)

7/3)+(-7/6)

9/4+(-3/2)

3.75+(2.25)+5/4

-3.75+(+5/4)+(-1.5)

(-17/4)+(-10/3)+(+13/3)+(11/3)

(-1.8)+(+0.2)+(-1.7)+(0.1)+(+1.8)+(+1.4)

(+1.3)-(+17/7)

(-2)-(+2/3)

|(-7.2)-(-6.3)+(1.1)|

|(-5/4)-(-3/4)|-|1-5/4-|-3/4|)

(-4)(+6)(-7)

(-27)(-25)(-3)(-4)

0.001*(-0.1)*(1.1)

24*(-5/4)*(-12/15)*(-0.12)

(-3/2)(-4/3)(-5/4)(-6/5)(-7/6)(-8/7)

(-24/7)(11/8+7/3-3.75)*24

(-71/8)*(-23)-23*(-73/8)

(-7/15)*(-18)*(-45/14)

(-2.2)*(+1.5)*(-7/11)*(-2/7)

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

5+21*8/2-6-59

68/21-8-11*8+61

-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

有理数的加减混合运算

【【同步达纲练习】

1.选择题:

(1)把-2-(+3)-(-5)+(-4)+(+3)写成省略括号和的形式,正确的是( )

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)计算(-5)-(+3)+(-9)-(-7)+ 所得结果正确的是( )

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

(3)-7,-12,+2的代数和比它们的绝对值的和小( )

A.-38 B.-4 C.4 D.38

(4)若 +(b+3)2=0,则b-a- 的值是( )

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

(5)下列说法正确的是( )

A.两个负数相减,等于绝对值相减

B.两个负数的差一定大于零

C.正数减去负数,实际是两个正数的代数和

D.负数减去正数,等于负数加上正数的绝对值

(6)算式-3-5不能读作( )

A.-3与5的差 B.-3与-5的和

C.-3与-5的差 D.-3减去5

2.填空题:(4′×4=16′)

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

(2)6-11+4+2=- + - + ;

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

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

3.把下列各式写成省略括号的和的形式,并说出它们的两种读法:(8′×2=16′)

(1)(-21)+(+16)-(-13)-(+7)+(-6);

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

4.计算题(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.当x=-3.7,y=-1.8,z=-1.5时,求下列代数式的值(5′×4=20′)

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

【素质优化训练】

(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.当x= ,y=- ,z=- 时,分别求出下列代数式的值;

(1)x-(-y)+(-z); (2)x+(-y)-(+z);

(3)-(-x)-y+z; (4)-x-(-y)+z.

3.就下列给的三组数,验证等式:

a-(b-c+d)=a-b+c-d是否成立.

(1)a=-2,b=-1,c=3,d=5;

(2)a=23 ,b=-8,c=-1 ,d=1 .

4.计算题

(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

【生活实际运用】

某水利勘察队,第一天向上游走5 千米,第二天又向上游走5 ,第三天向下游走4 千米,第四天又向下游走4.5千米,这时勘察队在出发点的哪里?相距多少千米?

参考答案:

【同步达纲练习】

1.(1)C;(2)B;(3)D;(4)A;(5)C;(6)C 2.(1)4,(-7),(-9) (2)(-6),(-11),(-4),2; (3)-5,8,2,3; (4)3,7,2;

3.略4.(1)-4; (2)-80; (3)-30.5 (4)-5

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

【素质优化训练】

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

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

3.(1) (2)都成立.

4.(1)-

(2)

(3)-29.5

(4)-1 第(4)题注意同号的数、互为相反数先分别结合。

【生活实际运用】

1.上游1 千米

1.125*3+125*5+25*3+25

2.9999*3+101*11*(101-92)

3.(23/4-3/4)*(3*6+2)

4. 3/7 × 49/9 - 4/3

5. 8/9 × 15/36 + 1/27

6. 12× 5/6 – 2/9 ×3

7. 8× 5/4 + 1/4

8. 6÷ 3/8 – 3/8 ÷6

9. 4/7 × 5/9 + 3/7 × 5/9

10. 5/2 -( 3/2 + 4/5 )

11. 7/8 + ( 1/8 + 1/9 )

12. 9 × 5/6 + 5/6

13. 3/4 × 8/9 - 1/3

14. 7 × 5/49 + 3/14

15. 6 ×( 1/2 + 2/3 )

16. 8 × 4/5 + 8 × 11/5

17. 31 × 5/6 – 5/6

18. 9/7 - ( 2/7 – 10/21 )

19. 5/9 × 18 – 14 × 2/7

20. 4/5 × 25/16 + 2/3 × 3/4

21. 14 × 8/7 – 5/6 × 12/15

22. 17/32 – 3/4 × 9/24

23. 3 × 2/9 + 1/3

24. 5/7 × 3/25 + 3/7

25. 3/14 ×× 2/3 + 1/6

26. 1/5 × 2/3 + 5/6

27. 9/22 + 1/11 ÷ 1/2

28. 5/3 × 11/5 + 4/3

29. 45 × 2/3 + 1/3 × 15

30. 7/19 + 12/19 × 5/6

31. 1/4 + 3/4 ÷ 2/3

32. 8/7 × 21/16 + 1/2

33. 101 × 1/5 – 1/5 × 21

34.50+160÷40

35.120-144÷18+35

36.347+45×2-4160÷52

37(58+37)÷(64-9×5)

38.95÷(64-45)

39.178-145÷5×6+42

40.812-700÷(9+31×11)

41.85+14×(14+208÷26)

43.120-36×4÷18+35

44.(58+37)÷(64-9×5)

45.(6.8-6.8×0.55)÷8.5

46.0.12× 4.8÷0.12×4.8

47.(3.2×1.5+2.5)÷1.6

48.6-1.6÷4= 5.38+7.85-5.37=

49.7.2÷0.8-1.2×5= 6-1.19×3-0.43=

50.6.5×(4.8-1.2×4)=

51.5.8×(3.87-0.13)+4.2×3.74

52.32.52-(6+9.728÷3.2)×2.5

53.[(7.1-5.6)×0.9-1.15] ÷2.5

54.5.4÷[2.6×(3.7-2.9)+0.62]

55.12×6÷(12-7.2)-6

56.12×6÷7.2-6

57.0.68×1.9+0.32×1.9

58.58+370)÷(64-45)

59.420+580-64×21÷28

60.136+6×(65-345÷23)

15-10.75×0.4-5.7

62.18.1+(3-0.299÷0.23)×1

63.(6.8-6.8×0.55)÷8.5

64.0.12× 4.8÷0.12×4.8

65.(3.2×1.5+2.5)÷1.6

66.3.2×6+(1.5+2.5)÷1.6

67.0.68×1.9+0.32×1.9

68.10.15-10.75×0.4-5.7

69.5.8×(3.87-0.13)+4.2×3.74

70.32.52-(6+9.728÷3.2)×2.5

71.[(7.1-5.6)×0.9-1.15] ÷2.5

72.5.4÷[2.6×(3.7-2.9)+0.62]

73.12×6÷(12-7.2)-6

>>>>精品(暖文爽文)在线阅读<<<<

74.12×6÷7.2-6

75.33.02-(148.4-90.85)÷2.5

1) 76.(25%-695%-12%)*36

77./4*3/5+3/4*2/5

78.1-1/4+8/9/7/9

79.+1/6/3/24+2/21

80./15*3/5

81.3/4/9/10-1/6

82./3+1/2)/5/6-1/3]/1/7

83./5+3/5/2+3/4

84.(2-2/3/1/2)]*2/5

85.+5268.32-2569

86.3+456-52*8

87.5%+6325

88./2+1/3+1/4

2) 89+456-78

3) 5%+. 3/7 × 49/9 - 4/3

4) 9 × 15/36 + 1/27

5) 2× 5/6 – 2/9 ×3

6) 3× 5/4 + 1/4

7) 94÷ 3/8 – 3/8 ÷6

8) 95/7 × 5/9 + 3/7 × 5/9

9) 6/2 -( 3/2 + 4/5 )

10) 8 + ( 1/8 + 1/9 )

11) 8 × 5/6 + 5/6

12) 1/4 × 8/9 - 1/3

13) 10 × 5/49 + 3/14

14) 1.5 ×( 1/2 + 2/3 )

15) 2/9 × 4/5 + 8 × 11/5

16) 3.1 × 5/6 – 5/6

17) 4/7 - ( 2/7 – 10/21 )

18) 19 × 18 – 14 × 2/7

19) 5 × 25/16 + 2/3 × 3/4

20) 4 × 8/7 – 5/6 × 12/15

21) 7/32 – 3/4 × 9/24

22) 1、 2/3÷1/2-1/4×2/5

2、 2-6/13÷9/26-2/3

3、 2/9+1/2÷4/5+3/8

4、 10÷5/9+1/6×4

5、 1/2×2/5+9/10÷9/20

6、 5/9×3/10+2/7÷2/5

7、 1/2+1/4×4/5-1/8

8、 3/4×5/7×4/3-1/2

9、 23-8/9×1/27÷1/27

10、 8×5/6+2/5÷4

11、 1/2+3/4×5/12×4/5

12、 8/9×3/4-3/8÷3/4

13、 5/8÷5/4+3/23÷9/11

23) 1.2×2.5+0.8×2.5

24) 8.9×1.25-0.9×1.25

25) 12.5×7.4×0.8

26) 9.9×6.4-(2.5+0.24)(27) 6.5×9.5+6.5×0.5

0.35×1.6+0.35×3.4

0.25×8.6×4

6.72-3.28-1.72

0.45+6.37+4.55

5.4+6.9×3-(25-2.5)2×41846-620-380

4.8×46+4.8×54

0.8+0.8×2.5

1.25×3.6×8×2.5-12.5×2.4

28×12.5-12.5×20

23.65-(3.0实数计算题资料|初一实数计算题100道7+3.65)

(4+0.4×0.25)8×7×1.25

50道八年级上册的实数计算题


1、(3ab-2a)÷a 2、(x^3-2x^y)÷(-x^2) 3、-21a^2b^3÷7a^2b 4、(6a^3b-9a^c)÷3a^2 5、(5ax^2+15x)÷5x 6、(a+2b)(a-2b) 7、(3a+b)^2 8、(1/2 a-1/3 b)^2 9、(x+5y)(x-7y) 10、(2a+3b)(2a+3b) 11、(x+5)(x-7) 12、5x^3×8x^2 13、-3x×(2x^2-x+4) 14、11x^12×(-12x^11) 15、(x+5)(x+6) 16、(2x+1)(2x+3) 17、3x^3y×(2x^2y-3xy) 18、2x×(3x^2-xy+y^2) 19、(a^3)^3÷(a^4)^2 20、(x^2y)^5÷(x^2y)^3 21、(y^3)^3÷y^3÷(-y^2)^2 22、(-2mn^3)^3 23、(2x-1)(3x+2) 24、(2/3 x+3/4y)^2 25、2001^2-2002×2002 26、(2x+5)^2-(2x-5)^2 27、-12m^3n^3÷4m^2n^3 28、2x^2y^2-4y^3z 29、1-4x^2 30、x^3-25x 31、x^3+4x^2+4x 32、(x+2)(x+6) 33、2a×3a^2 34、(-2mn^2)^3 35、(-m+n)(m-n) 36、27x^8÷3x^4 37、(-2x^2)×(-y)+3xy×(1-1/3 x) 38、am-an+ap 39、25x^2+20xy+4y^2 40、(-4m^4+20m^3n-m^2n^2)÷(-4m^2) 41、(12p^3q^4+20p^3q^2r-6p^4q^3)÷(-2pq)^2 42、[4y(2x-y)-2x(2x-y)]÷(2x-y) 43、(x^2y^3-1/2 x^3y^2+2x^2y^2)÷1/2 xy^2 44、(4a^3b^3-6a^2b^3c-2ab^5)÷(-2ab^2) 45、(ax+bx)÷x 46、(ma+mb+mc)÷m 47、(9x^4-15x^2+6x)÷3x 48、(28a^3b^2c+a^2b^3-14a^2b^2)÷(-7a^2b) 49、(6xy^2)^2÷3xy 50、24a^3b^2÷3ab^2

求初二上实数计算题60道


解方程√3 X-1=√2 X

求X

{√5 X-3√ Y=1}

{√3 X-√5 Y=2}

注:X全部不在根号内

√(1/2x)^2+10/9x^2

=√[1/(4x^2)+10/(9x^2)]

=√49/36x^2

若x&gt;0,=7/(6x)

若x&lt;0,=-7/(6x)

√a^4mb^2n+1

=√(a^2mb^n)^2+1

=a^2mb^n+1

√(4a^5+8a^4)(a^2+3a+2)

=√[4a^4(a+2)][(a+2)(a+1)]

=√[4a^4(a+2)^2(a+1)]

=2a^2(a+2)√(a+1)

. 3√(1/6)-4√(50)+30√(2/3)

答案3√(1/6)-4√(50)+30√(2/3)

= 3×√6/6-4×5√2+30×√6/3

=√6/2-20√2+10√6

2. (1-根号2)/2乘以(1+根号2)/2

题是这样的二分之一减根号2乘以二分之一加根号2

答案:(1-根号2)/2乘以(1+根号2)/2

=(1-√2)*(1-√2)/4

=(1-2)/4

=-1/4

1.3√(1/6)-4√(50)+30√(2/3) 答案3√(1/6)-4√(50)+30√(2/3) = 3×√6/6-4×5√2+30×√6/3 =√6/2-20√2+10√6 2. (1-根号2)/2乘以(1+根号2)/2 题是这样的二分之一减根号2乘以二分之一加根号2 答案:(1-根号2)/2乘以(1+根号2)/2 =(1-√2)*(1-√2)/4 =(1-2)/4 =-1/4 3.√(1/2x)^2+10/9x^2 √[(1/2x)^2+10/9x^2] =√(x^2/4+10x^2/9) =√(9x^2/36+40x^2/36) =√(49x^2/36) =7x/6; 4.√a^4mb^2n+1(a、b为正数) [√(a^4mb^2n)]+1(a、b为正数) =a^2mb^n+1; 5.√(4a^5+8a^4)(a^2+3a+2)(a&gt;=0) √[(4a^5+8a^4)(a^2+3a+2)](a&gt;=0) =√[4a^4(a+2)(a+2)(a+1)] =√[(2a^2)^2(a+2)^2(a+1)] =2a^2(a+2)√(a+1). 太多了呀,只能这样了,我还有事 您好! ①5√8-2√32+√50 =5*3√2-2*4√2+5√2 =√2(15-8+5) =12√2 ②√6-√3/2-√2/3 =√6-√6/2-√6/3 =√6/6 ③(√45+√27)-(√4/3+√125) =(3√5+3√3)-(2√3/3+5√5) =-2√5+7√5/3 ④(√4a-√50b)-2(√b/2+√9a) =(2√a-5√2b)-2(√2b/2+3√a) =-4√a-6√2b ⑤√4x*(√3x/2-√x/6) =2√x(√6x/2-√6x/6) =2√x*(√6x/3) =2/3*x*√6 ⑥(x√y-y√x)÷√xy =x√y÷√xy-y√x÷√xy =√x-√y ⑦(3√7+2√3)(2√3-3√7) =(2√3)^2-(3√7)^2 =12-63 =-51 ⑧(√32-3√3)(4√2+√27) =(4√2-3√3)(4√2+3√3) =(4√2)^2-(3√3)^2 =32-27 =5 ⑨(3√6-√4)2 =(3√6)^2-2*3√6*√4+(√4)^2 =54-12√6+4 =58-12√6 ⑩(1+√2-√3)(1-√2+√3) =[1+(√2-√3)][1-(√2-√3)] =1-(√2-√3)^2 =1-(2+3+2√6) =-4-2√6 1. =5√5 - 1/25√5 - 4/5√5 =√5*(5-1/25-4/5) =24/5√5 2.=√144+576 =√720 =12√5 3.)√(8/13)^2-(2/13)^2 = √(8/13+2/13)(8/13-2/13) =(2/13)√15

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