Janessa bought 4 stamps for $1.84. At this,rate how much would 10 stamps cost?

2 answers

1.84/4 = ?

Multiply that answer by 10.
If 4 stamps cost $1.84, the you will divide $1.84 by 4 to get the price of 1stamp:
So, $1.84/4 = $0.46
If 1 stamp costs $0.46, then multiply it by ten to get the price of 10stamps:
$0.46 x 10 = $4.6

Now try this and see if you understand the question:
Janessa bought 12 oranges for $14.4. At this rate, how much would 25oranges cost?