Question

9999*7778+3333*6666 简便算法

Answer 1

9999*7778+3333*6666
=9999*7778+3333*3*2222
=9999*7778+9999*2222
=9999*(7778+2222)
=9999*10000
=99990000
或者
规律： 3*6=18 33*66=2178 333*666=221778 3333*6666=22217778
9999*7778+3333*6666
=（10000-1）*7778+22217778
=10000*7778-7778+22217778
=77780000-7778+22217778
=77772222+22217778
=99990000
望楼主采纳~希望能帮到你~

Answer 2

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

Answer 3

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

Answer 4

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