70+30×14简便运算

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70+30×14简便运算70+30×14简便运算70+30×14简便运算70+30×14=70+6*70=70*(1+6)=70*7=49070+30×14=70+6*70=70*(1+6)=70*7

70+30×14简便运算
70+30×14简便运算

70+30×14简便运算
70+30×14=70+6*70=70*(1+6)=70*7=490

70+30×14=70+6*70=70*(1+6)=70*7=490