Question

奥数题9999*2222+3333*3334

Answer 1

9999*2222+3333*3334

=9*2*1111*1111+3333*(3333+1)

=18*1111*1111+3333*3333+3333

=18*1111*1111+9*1111*1111+3*1111

=(18+9)*1111*1111+3*1111

=27*1111*1111+3*1111

=3*1111(9999+1)

=33330000