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整理和复习,1,解方程的原理是什么?要注意什么?,(1)等式的两边同时加上或减去相等的数,等式不变。,(2)等式的两边同时乘或除以相等的数(0除外),等式不变。,2,1230,1242,630,530,解:12123012,解:12124212,解:66306,解:55305,42,30,5,150,3,1230,1242,630,530,61242,解:612124212,630,66306,5,62642,解:61242,612124212,630,66306,5,6(2)42,解:6(2)6426,27,2272,5,530,解:630,66306,5,4,刚才这些方程可不可以简化解方程的过程?,5,61242,解:6+1 2124212,630,66306,5,62642,解:61242,612124212,630,66306,5,6(2)42,解:6(2)6426,27,2272,5,530,解:630,66306,5,解:64212,306,64212,306,306,解:2426,72,6,解下列方程,可以用你喜欢的方法。,7,8,9,10,11,12,13,14,15,谢谢大家,望同学们好好学习!,16,
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