简便计算:6666×3333+9999×7778 急用!

问题描述:

简便计算:6666×3333+9999×7778 急用!

原式=(2222*3)*3333 9999*7778
=2222*(3*3333) 9999*7778
=9999*(2222 7778)
=9999*10000
=99990000

6666×3333+9999×7778
=2222×3×3333+9999×7778
=(2222+7778)×9999
=10000×9999
=99990000

6666×3333+9999×7778
=2222×3×3333+9999×7778
=2222×9999+9999×7778
=9999×(2222+7778)
=9999×10000
=99990000

6666×3333+9999×7778
=9999×2222+9999×7778
=9999×(2222+7778)
=9999×10000
=99990000