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.

2 answers

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?