9.9×6.4 这一道简便运算题怎么写
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![9.9×6.4 这一道简便运算题怎么写](/uploads/image/z/33925-13-5.jpg?t=9.9%C3%976.4+%E8%BF%99%E4%B8%80%E9%81%93%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%E9%A2%98%E6%80%8E%E4%B9%88%E5%86%99)
9.9×6.4 这一道简便运算题怎么写
9.9×6.4 这一道简便运算题怎么写
9.9×6.4 这一道简便运算题怎么写
000最帅 ,
9.9×6.4
=(10-0.1)×6.4
=10×6.4-0.1×6.4
=64-0.64
=63.36
10*6.4-0.1*6.4=63.36
10*6.4-6.4
用:
(10乘以6.4)- (0.1乘以6.4)=64-0.64=63.36