Final answer:
To find out how many ounces of cheddar cheese are left in the block, subtract the amount that Marty cut from the original amount.
Step-by-step explanation:
To find out how many ounces of cheddar cheese are left in the block, we need to subtract the amount that Marty cut from the original amount.
Original amount of cheddar cheese = 4.6 ounces
Amount of cheese cut by Marty = 2.05 ounces
Therefore, ounces of cheddar cheese left = Original amount - Amount cut = 4.6 ounces - 2.05 ounces = 2.55 ounces.