數學簡便運算：387÷292929分之434343 387÷292929分之434343

=387÷(434343/292929)

=387÷[43x10101/(29x10101)]

=387÷(43/29)

=387x29/43

=9x43x29/43

=9x29

=(10-1)x29

=290-29

=261