人教版五年级上册《用式子表示天平平衡》.ppt

用式子表示天平平衡,20+30=50,？,20+x=100,x,50+x=100,50+2x100,802x,3x=150,100+20100+50,100+2x503,20+30=50,20+x=100,50+x=100,20+30=50,20+30=50,20+x=100,20+30=50,20+x=100,20+30=50,50+x=100,20+x=100,20+30=50,50+x=100,20+x=100,20+30=50,50+2x100,50+x=100,20+x=100,20+30=50,50+2x100,50+x=100,20+x=100,20+30=50,802x,50+2x100,50+x=100,20+x=100,20+30=50,802x,50+2x100,50+x=100,20+x=100,20+30=50,3x=150,802x,50+2x100,50+x=100,20+x=100,20+30=50,3x=150,802x,50+2x100,50+x=100,20+x=100,20+30=50,100+20100+50,3x=150,802x,50+2x100,50+x=100,20+x=100,20+30=50,100+20100+50,3x=150,802x,50+2x100,50+x=100,20+x=100,20+30=50,100+2x503,100+20100+50,3x=150,802x,50+2x100,50+x=100,20+x=100,20+30=50,100+2x503,100+20100+50,3x=150,802x,50+2x100,50+x=100,20+x=100,20+30=50,含有未知数的式子,不含有未知数的式子,100+2x503,100+20100+50,3x=150,802x,50+2x100,50+x=100,20+x=100,20+30=50,等式,不等式,判断：是方程吗？,35x=45,y+25,5x+32=47,6(a+2)=42,35+65=100,9b3=60,x+y=10,x1472,0.49x=7,3816+14,35x=45,5x+32=47,0.49x=7,35x=45,5x+32=47,9b3=60,0.49x=7,35x=45,5x+32=47,35x=45,5x+32=47,9b3=60,35x=45,5x+32=47,35+65=100,9b3=60,35x=45,5x+32=47,0.49x=7,35+65=100,9b3=60,35x=45,5x+32=47,是方程吗？,6x+=7836+=42,判断,1、“方程一定是等式，等式也一定是方程”这句话对吗？2、你能用自己的方式表示方程和等式之间的关系吗？,100+2x503,802x,100+20100+50,50+2x100,50+x=100,100-20=80,20+30=50,0.49x=7,35+65=100,9b3=60,35x=45,5x+32=47,等式,方程,方程一定是等式；但等式不一定是方程。,你会根据下面的图列出