Question

Scott and Nikki each have a full 1.5-gallon container of liquid laundry detergent. The lid on Scott’s container can hold 3 fluid ounces of detergent, while the lid on Nikki’s container can hold 4 fluid ounces of detergent. How many more lids full of detergent does Scott have than Nikki?
10 lids
16 lids
48 lids
64 lids

Answer 1

It says 4 fluid ounces for Nikki's container and 3 for Scott's. Eliminate 10 and 64. 64 is too high, and 10 is too low. Since 16 is close to 10, do you want to eliminate that? Yes, it's too low.

Answer 2

You cannot just estimate this without doing the calculations, especially since the volumes are in different units.

since 1 gallon = 128 fluid oz, you can multiply 1.5 gallons * 128 fluid oz to get the total volume in fluid oz

from there, since scott has a 3 oz lid, divide (total volume in oz) / 3 to get the number of scott's lids
same logic with nikki's, (total volume in oz) / 4

then subtract # of scott's lids - # of nikki's lids