(代數(shù)方法)
x-y=0.99
x=10y
(算術(shù)方法)
甲數(shù)的小數(shù)點(diǎn)向右移動(dòng)一位則與乙數(shù)相等---甲數(shù)是乙數(shù)的1/10.
甲、乙兩數(shù)的差是0.99----甲數(shù)的9倍是0,99,甲數(shù)是0.99/9=0.11.
乙數(shù)是甲數(shù)的10倍------0.11*10=1.1.