9.9×6.4 这一道简便运算题怎么写
问题描述:
9.9×6.4 这一道简便运算题怎么写
答
用:
(10乘以6.4)- (0.1乘以6.4)=64-0.64=63.36
答
10*6.4-6.4
答
000最帅 ,
9.9×6.4
=(10-0.1)×6.4
=10×6.4-0.1×6.4
=64-0.64
=63.36
答
10*6.4-0.1*6.4=63.36