(2.7×6.78+6.78×7.2)÷0.99 甲、乙兩數的積是0.44,如果甲數擴大5倍,那麼,甲、乙兩數的積是(

(2.7×6.78+6.78×7.2)÷0.99 甲、乙兩數的積是0.44,如果甲數擴大5倍,那麼,甲、乙兩數的積是(

(2.7×6.78+6.78×7.2)÷0.99
=(2.7×7.2)×6.78÷0.99
=9.9×6.78÷0.99
=10×6.78
=67.8