Yes, but this is to aid in a proper transition. All old ipv4 addresses will route fine, using this method.
> The dotted quad notation is just a human readable notation. You can’t just add another octet willy nilly. That’s exactly what ipv6 did. They added an extra 12 octets, but used hex notation (0-F) to shorten the number of characters for human readability.
If that's all IPv6 did that would have been one thing. ipv6 changed tons of things, from arp to nat, dhcp to dns.
Internally, an IP is just a 32bit number. Adding another octet is adding another 8bits to the number. IPv6 merely expands that number to a 128bit number.
If you do the math of say converting 8.8.8.8 to 8256^3 + 8256^2 + 8256^1 + 8256^0 and ping the resulting number, it will work.