Unless they're from the first part of the 20th century, they really wouldn't have any extra value versus their individual prices. For that, you need to know their dates and whether they've been in circulation or not.
The value of a five dollar bill is five dollars. It's not clear what you mean by "consecutive serial numbers." If you mean that the bill's serial number looks like "12345678" or something, then a collector might be willing to pay a small premium for it as a curiosity. If you mean that you have two or more five dollar bills where the serial numbers are consecutive, they're worth five dollars each, period.
In general, they have no added value.
The United States two dollar bill are rare pieces of money that are not printed any more. You can cash in the value of these bills at most American banks.
You go in to the bank, give the clerk two dollars and ask for a two dollar bill in exchange.
If it's series 1976 or later, it's worth two dollars. Anything before that begins to have collector value, but for a specific value, ask about a specific bill.
Face value.
The blue seals indicate your bills are silver certificates. In circulated condition the consecutive serial numbers add only a small amount to their normal $8 to $10 retail value.
$100
If the bills are modern $1 Federal Reserve Notes with green seals, so many have been printed that getting two consecutive ones from a bank or in change isn't a rare event. If the bills are older, please post a new, separate question with their date and what letter, if any, is next to the date.
The value of a five dollar bill is five dollars. It's not clear what you mean by "consecutive serial numbers." If you mean that the bill's serial number looks like "12345678" or something, then a collector might be willing to pay a small premium for it as a curiosity. If you mean that you have two or more five dollar bills where the serial numbers are consecutive, they're worth five dollars each, period.
In general, they have no added value.
8
1000 dollars. While some collectors will pay more for consecutive bills, there is no standard way of appraising value based solely on serial number. There are a variety of other factors that can increase their combined value.
The U.S. did not print any $2 bills with that date.
The United States two dollar bill are rare pieces of money that are not printed any more. You can cash in the value of these bills at most American banks.
Eight dollars.
If you had a sheet of uncut two dollar bills, they would be worth far more than just two bills. Depending on their condition, the bills together would fetch between $2 and $10.