680乘以56加440乘以68用简便方法怎么算

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680乘以56加440乘以68用简便方法怎么算680乘以56加440乘以68用简便方法怎么算680乘以56加440乘以68用简便方法怎么算你好:680×56+440×68=68×560+440×68=

680乘以56加440乘以68用简便方法怎么算
680乘以56加440乘以68用简便方法怎么算

680乘以56加440乘以68用简便方法怎么算
你好:
680×56+440×68
=68×560+440×68
=68×(560+440)
=68×1000
=68000