Some math, not to hard

I've been following a principle that if I get an AMP that has a lower ohm than the subwoofers. This said woofers would flow with the amps ohm or at least drop down to meet that ohm

1st Example: (1) 1ohm amp + (2) 2ohm woofer = (2) 1ohm woofer

2nd example: (1) 1ohm amp + (2) 4ohm woofer = (2) 2ohm woofer