3道简单的口算题(1)88888*99999=(2)8888888888*9999999999=

问题描述:

3道简单的口算题
(1)88888*99999=
(2)8888888888*9999999999=

8888711112

(1)88888*99999
=88888*(100000-1)
=8888800000-88888
=8888711112
(2)8888888888*9999999999
=8888888888*(10000000000-1)
=88888888880000000000-8888888888
=8888888871111111112
第三题呢?

(1)88888*99999
=88888*(100000-1)
=8888800000-88888
=8888711112
(2)8888888888*9999999999
=8888888888*(10000000000-1)
=88888888880000000000-8888888888
=88888888871111111112

就两道啊。

(1)8888711112
(2)88888888871111111112
(有规律的口算题)