12.( )乘( )( ).6等于4.4( )( )
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12.( )乘( )( ).6等于4.4( )( )
![12.( )乘( )( ).6等于4.4( )( )](/uploads/image/z/15511866-42-6.jpg?t=12.%28+%29%E4%B9%98%28+%29%28+%29.6%E7%AD%89%E4%BA%8E4.4%28+%29%28+%29)
4.4+4.4x12+13x5.6
=4.4x(1+12)+5.6x13
=4.4x13+5.6x13
=(4.4+5.6)x13
=10x13
=130
再问: 12.( )
乘 ( )( ).6
——————————
7( )4
( )7( )
——————————
4.4( )( )
=4.4x(1+12)+5.6x13
=4.4x13+5.6x13
=(4.4+5.6)x13
=10x13
=130
再问: 12.( )
乘 ( )( ).6
——————————
7( )4
( )7( )
——————————
4.4( )( )