400
YOU GO INTO A BOOKSTORE WITH 10 DOLLARS, YOU GIVE 5 DOLLARS TO YOUR SISTER YOUR SISTER BUYS 1 BOOK AND AND A SNACK FROM THE BENDING MACHINE. THE BOOK COST 3.50 THE SNACK COST 1 DOLLAR SHE GAVE THE EXTRA MONEY TO YOU HOW MUCH MONEY DO YOU HAVE EXPLAIN.
What is 5.50 YOU HAD 5 DOLLAR AND SHE SPENT 4.50 SO GAVE YOU AN EXTRA 50 CENTS