Question

How many pennies are in a $10 bill?
How many nickles are in a $20 bill?
SHOW ALL YOUR WORK!

Answer 1

since 1 dollar has 100 pennies.
so 10 × 100 = 1000
and 20 × 100 = 2000

Answer 2

so we know there are 100 pennies in $1 so 100 times 10 should equal 1,000 pennies. There are 400 nickels in a $20.  1 dollars equals to 20 nickels. I really do hope that works.