20023002×20022003-20023003×20022002=?

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20023002×20022003-20023003×20022002=?20023002×20022003-20023003×20022002=?20023002×20022003-20023003

20023002×20022003-20023003×20022002=?
20023002×20022003-20023003×20022002=?

20023002×20022003-20023003×20022002=?
20023002×20022003-20023003×20022002
=(20023002+1)×20022003-20022003-20023003×2002202
=20023003×20022003-20023003×2002202-20022003
=20023003×(2002203-2002202)-2002203
=20023003-2002203
=1000

1,20023002x20022003=400900606113006

2,20023003x20022002=400900606112006
3,400900606113006-400900606112006=1000