0.8888乘0.7加0.2222乘1.2等於多少(要過程)

0.8888乘0.7加0.2222乘1.2等於多少(要過程)

0.8888×0.7 + 0.2222×1.2
= 0.8888×0.7 + 0.8888×0.3
= 0.8888×1
= 0.8888