七年级下数学计算题50道
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/18 09:57:47
1.4x+2=x+73x=5x=5/32.3-6x-4=2/3-6x=5/3x=-5/183.(4x+2)/6-(5x-1)/6-x+3=6x=-34.4x/(2x+6)+1=7/(2x+6)7-4x
1-1/3[x-(1+x)/3]=x/2-1/2[2x-(10-7x)/3]1-1/3[x-1/3+x/3]=x/2-1/2[2x-10/3+7x/3]1-1/3[4x/3-1/3]=x/2-1/2[
(1):(-8)-(-15)+(-9)-(-12)=-8+15-9+12=10(2):(-40)+29-(-15)-|-24|=-21+15-24=-30(3):(2/3)-(1/8)-(-1/3)+
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
一、解方程.32X+88=3480204-X+76=196X-(135-98)=254X-15=178×125-40X=6000.4X÷5=0.62X+0.82=0.823+0.5X=7X+80×2=
2x+17=353x-64=1112+8x=520.8x-4.2=2.22x+5=103x-15=754x+4o=3203x+77=1225x-1.6=0.66x-4=2010x-0.6=2.4500
文库有哦
1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6-2/9×34.8×5/4+1/45.6÷3/8-3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)
1)66x+17y=396725x+y=1200答案:x=48y=47(2)18x+23y=230374x-y=1998答案:x=27y=79(3)44x+90y=779644x+y=3476答案:x
1.3/7×49/9-4/32.8/9×15/36+1/273.12×5/6–2/9×34.8×5/4+1/45.6÷3/8–3/8÷66.4/7×5/9+3/7×5/97.5/2-(3/2+4/5)
4.58-(2.58+1.5)2.3÷0.25÷0.45.6÷3.52.7×0.990.125×3.2×0.253.72×9.9+3.72×0.10.99×0.81+0.99×0.19+0.991.3
1因为4x²+bx+36是一个完全平方式原式=(2x)²+bx+6²=(2x)²+(-)2*2x*6+6²=(2x)²+(-)24x+6&s
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
上pep,人教网,到百度搜pep就有
百度知道多是答题的人,求题目的话比较难,建议自己到百度文库找找看吧.
-13302005-4-6.7503111.6a+7a-2
这样的问题可以到百度文库中去找,很方便的.
丨-3丨+丨-10丨-丨-1丨=3+10-1=13-1=12丨-24丨÷丨-3丨x丨-2丨=24÷3×2=16(6分之5-丨-2分之1丨+丨+3分之1丨)x丨-6丨=(5/6-1/2+1/3)×6=5
(1)(-3)-(-7)(2)(-34)-(+13)(3)(-5)+2(4)(-3)-(+5)+(-7)-(-5)(5)-2-(+3)-(-5)+(-4)+3(6)0-[73+(-219)-(+81)
29.(ym)3•yn60.(-ab)3•(-a2b)•(-a2b4c)2.61.[(-a)2m]3•a3m+[(-a)5m]2.62.xn+1(xn-