资源描述
2,.解简易方程,第五单元简易方程,第5课时解方程(3),一、填一填,,,解方程。,1,. 4,x,8,44,解:,4,x,8,44,4,x,4,x,x,8,8,36,4,36,4,9,2,. 4(,x,6),20,解:,4(,x,6),20,x,6,x,6,x,4,4,5,6,5,6,11,二、解方程。,7,x,3,24,8,x,28,40,解,:,x,3,解,:,x,3,5(,x,5.5),120 (,x,2.4)3,2.5,解,:,x,18.5,解,:,x,9.9,三、在 里填上,“,”“,”,或,“,”,。,1,.,当,x,40,时,,3,x,24,98,3,x,24,98,2,.,当,x,12,时,,2.5,x,1.5,x,40 2.5,x,1.5,40,3,.,当,x,4.5,时,,8,x,2,x,27,8,x,2,x,27,4,.,当,x,12,时,,(4,x,24)41,8,(4,x,24)41,8,四、用方程表示下面的数量关系,,,并求出方程的解。,1.,3,x,30,270,解,:,x,80,2.,5,y,80,370,解,:,y,90,3,.10,减去,m,的,2.2,倍,差是,3.4,。,10,2.2,m,3.4,解,:,m,3,五、,关于,x,的方程,4,x,8,12,与,(,m,3),x,75,有相同解。求,m,的值。,4,x,8,12,解,:,x,5,5(,m,3),75,解,:,m,18,
展开阅读全文