It sounds like you have funds held directly by the mutual fund company (Fidelity) as opposed to owning funds in a brokerage account.  When your funds are held at the fund company, each fund has to be reported separately.  Each of them should have their own Tax ID #.  If this is the case, you will have to enter each one as a separate Form 1099-DIV or 1099-INT, if there is any interest paid.

just enter the total in 1a which should be same as provided by Fidelity on the 1099-DIV form at the front of your statement.  I can't think of a reason to split these.

For the US Gov Obligations $ amount, if you are looking for state tax exemption on that, you need to calculate that for each fund based on their contribution to Box 1a multiplied by the % provided for each fund in the supplemental info (see Fidelity website / tax resources - likely low % for blue chip growth, high % for gov cash reserves).  Those $ amounts can then be entered as a single total.