6.25乘以4.5加0.45乘以37.5用简算 6.25乘以4.5加0.45乘以37.5用简算6.25乘以4.5加0.45乘以37.5用简算 =6.25x4.5+4.5x3.75 =4.5x(6.25+3.75) =4.5x10 =45
5.6x37.5+56+6.25要怎么简便方法算数 二5.6X37.5十5.6X62.5 二5.6X(37.5十62.5) 二5.6X100 二5600