Question

Roel gives 0.5 of his marbles to rey. Rey gives 0.5 of these to ricky. Ricky gives 0.5 of these to rex. If rex has 4 marbles, how many marbles does roel have originally?

Answer 1

Answer:

32 marbles

Step-by-step explanation:

The problem is asking us to find x in this equation:

x*0.5*0.5*0.5=4                      Keep in mind that * is multiplying.

If we simplify that, we get x/2/2/2=4                        / is dividing

Using inverse operations, x=4*2*2*2

x=8*2*2

x=16*2

x=32