1樓:匿名使用者
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)?
=(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√12×√18
=5*2√3*3√2
=30√6;
求八年級下冊數學計算題(人教版)100道
2樓:趙明薈
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+222+(-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)/1/218-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
-5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
2.4-(-3/5)+(-3.1)+4/5(-6/13)+(-7/13)-(-2)
3/4-(-11/6)+(-7/3)
11+(-22)-3×(-11)
(-0.1)÷1/2×(-100)
2.4-(-3/5)+(-3.1)+4/5(-6/13)+(-7/13)-(-2)
3/4-(-11/6)+(-7/3)
11+(-22)-3×(-11)
(-0.1)÷1/2×(-100)
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+222+(-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)/1/218-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y.(-8)-(-1)2.45+(-30)
3.-1.5-(-11.5)
4.-1/4-(-1/2)
5.15-[1-(20-4)]
6.-40-28-(-19)+(-24)
7.22.54+(-4.4)+(-12.54)+4.48.(2/3-1/2)-(1/3-5/6)7(2x-1)-3(4x-1)=4(3x+2)-1;
(5y+1)+ (1-y)= (9y+1)+ (1-3y);
20%+(1-20%)(320-x)=320×40%2(x-2)+2=x+1
2(x-2)-3(4x-1)=9(1-x)x/3 -5 = (5-x)/2
2(x+1) /3=5(x+1) /6 -1(1/5)x +1 =(2x+1)/4
(5-2)/2 - (4+x)/3 =1
x/3 -1 = (1-x)/2
(x-2)/2 - (3x-2)/4 =-111x+64-2x=100-9x
15-(8-5x)=7x+(4-3x)
3(x-7)-2[9-4(2-x)]=223/2[2/3(1/4x-1)-2]-x=22(x-2)-3(4x-1)=9(1-x)11x+64-2x=100-9x
15-(8-5x)=7x+(4-3x)
3(x-7)-2[9-4(2-x)]=223/2[2/3(1/4x-1)-2]-x=22(x-2)+2=x+1
1.7(2x-1)-3(4x-1)=4(3x+2)-12.(5y+1)+ (1-y)= (9y+1)+ (1-3y)3.[ (- 2)-4 ]=x+2
4.20%+(1-20%)(320-x)=320×40%5.2(x-2)+2=x+1
6.2(x-2)-3(4x-1)=9(1-x)7.11x+64-2x=100-9x
8.15-(8-5x)=7x+(4-3x)9.3(x-7)-2[9-4(2-x)]=2210.3/2[2/3(1/4x-1)-2]-x=211.5x+1-2x=3x-2
12.3y-4=2y+1
13.87x*13=5
14.7z/93=41
15.15x+863-65x=54
16.58y*55=27489
17.2(x+2)+4=9
18.2(x+4)=10
19.3(x-5)=18
20.4x+8=2(x-1)
21.3(x+3)=9+x
22.6(x/2+1)=12
23.9(x+6)=63
24.2+x=2(x-1/2)
25.8x+3(1-x)=-2
26.7+x-2(x-1)=1
27.x/3 -5 = (5-x)/2
28.2(x+1) /3=5(x+1) /6 -129.(1/5)x +1 =(2x+1)/430.
(5-2)/2 - (4+x)/3 =115x-8(5x+1.5)=18*1.25+x3x+189=521
4y+119=22
3x*189=5
8z/6=458
3x+77=59
4y-6985=81
87x*13=5
7z/93=41
15x+863-65x=54
58y*55=27489
1. 2(x-2)-3(4x-1)=9(1-x)2. 11x+64-2x=100-9x
3. 15-(8-5x)=7x+(4-3x)4. 3(x-7)-2[9-4(2-x)]=225.
3/2[2/3(1/4x-1)-2]-x=26. 2(x-2)+2=x+1
7. 0.4(x-0.2)+1.5=0.7x-0.388. 30x-10(10-x)=100
9. 4(x+2)=5(x-2)
10. 120-4(x+5)=25
11. 15x+863-65x=54
12. 12.3(x-2)+1=x-(2x-1)13. 11x+64-2x=100-9x14. 14.59+x-25.31=0
15. x-48.32+78.51=8016. 820-16x=45.5×8
17. (x-6)×7=2x
18. 3x+x=18
19. 0.8+3.2=7.2
20. 12.5-3x=6.5
21. 1.2(x-0.64)=0.5422. x+12.5=3.5x
23. 8x-22.8=1.2
24. 1\ 50x+10=60
25. 2\ 60x-30=20
26. 3\ 3^20x+50=110
27. 4\ 2x=5x-3
28. 5\ 90=10+x
29. 6\ 90+20x=30
30. 7\ 691+3x=700
1 2x-10.3x=15
2 0.52x-(1-0.52)x=803 x/2+3x/2=7
4 3x+7=32-2x
5 3x+5(138-x)=540
6 3x-7(x-1)=3-2(x+3)7 18x+3x-3=18-2(2x-1)8 3(20-y)=6y-4(y-11)9 -(x/4-1)=5
10 3[4(5y-1)-8]=6
(1)-3x-6x2=7
(2)5x+1-2x=3x-2
(3)3y-4=2y+1
(4)3y-4=y+3
(5)3y-y=3+4
(6)0.4x-3=0.1x+2
(7)5x+15-2x-2=10
(8)2x-4+5-5x=-1
(9)3x+189=521
(10)4y+119=22
(11)3x*189=5
(12)8z/6=458
(13)3x+77=59
(14)4y-6985=81
(15)87x*13=5
(16)46/x=23 x=2
(17)64/x=8 x=8
(18)99/x=11 x=9
求四年級下冊數學脫式計算題120道我沒有學方程
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