999×778+333×666 这题用简便方法怎么做

2024-12-15 16:33:22
推荐回答(5个)
回答1:

=999×778+999×222
=999×(778+222)
=999×1000
=999000

回答2:

=999*778+333*3*222
=999*778+999*222
=999*(778+222)
=999*1000
=999000

回答3:

999X778+333x666
=999X778+333x3X222
=999X778+999X222
=999X(778+222)
=999X1000
=999000

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回答4:

乘法分配律

回答5:

=777222+221778
=999000