6.4ⅹ23.2+64x20.68等于几,用简便方法解答：6.4ⅹ23.2+64x20.68＝6.4x23.2+6.4x206.8=6.4x(23.2+206.8)=6.4x230=1472
方法一：=64x2.32+64x20.68=64x(2.32+20.68)=64x23=1472方法二：=6.4x23.2+6.4x206.8=6.4x(23.2+206.8)=6.4x230=1472
