Jade buys a 500 gram bag of beads at a market.
each bead has a mass of 0.48 grams.
which of these is the best estimate for the number of beads in the 500 gram bag?
a.100
b. 250
c.1000
d. 2500

Your answer is c.1000 beads

think about it like this how many times can .48 go into 500...1041.67 times

or you can think of it like this how many .48g beads do i need to reach 500g

then you simply do some division 

remember be careful to put the decimal point when dividing!! hope this helps :)