Jenny has been saving her babysitting money for a class field trip to Washington, D.C. She wants to save
Estimate (without calculating) the amount that Jenny needs to earn during the third month to meet her goal.
Rounding makes numbers easier to add.
Now show how Jenny could calculate the amount of money she needs to earn.
How much money does Jenny already have?
Add what Jenny has saved in her first and second months.
If she needs
and has , how much more money does Jenny need? Subtraction will help..