math
posted by jasmin .
how knowing the number of pennies in one jar can help you estimate the number of pennies in a second jar that is four times as large. give me an example.

4500 pennies are in a pint...how many are in a half gallon (4pints).
ans: 4*4500 
If there are 100 pennies in one jar, there must be about 400 pennies in a jar that is four times as large.
Do you see how I got 400?