One ISP with two gateways two IP segments

Hi guys,

I have 1 blocks IP Public from 1 ISP, let’s say 10.10.0.1/29 (.1 is ISP g/w). From ISP FO Modem, I got 1 line to my switch(external). Mikrotik(dinara) and others server (with public IP) connected to this switch.
I put 10.10.0.2 as g/w on mikrotik and create local network at eth2. I use others public IPs for different servers.

Recently, I get 1 more block IP public from same ISP, let’s say 10.10.2.1/29 (.1 is ISP g/w).
How could I use this new IPs together with the old IPs through same modem?

Best,
Alex