递等式计算(能简便的就简便) 0.65x99

2025-01-20 10:45:18
推荐回答(2个)
回答1:

0.65x99
=0.65x(100-1)
=0.65x100-0.65
=65-0.65
=64.35

回答2:

0.65×99
=0.65×100-0.65×1
=65-0.65
=64.35