用简便方法计算:999*778+333*666
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用简便方法计算:999*778+333*666用简便方法计算:999*778+333*666用简便方法计算:999*778+333*666999×778+333×666=999×778+333×(3×
用简便方法计算:999*778+333*666
用简便方法计算:999*778+333*666
用简便方法计算:999*778+333*666
999×778+333×666
=999×778+333×(3×222)
=999×778+333×3×222
=999×778+999×222
=999×(778+222)
=999×1000
=999000