Question

three classmates spent money at the school supplies store mark spent 0.5 dollar, andre spent 0.45 dollar, and Raquel spent 0.52 dollar write a number sentence that compares the money to andre spent to the money that mark spent

Answer 1

Andre: 0.45 is equal to 9/20
Mark:   0.5 is equal to 5/10 which is equal to 10/20
So 9/20 + 1/20 is 10/20
1/20 is equal to 0.05 
ANSWER: Mark spent 0.05 more of a dollar than Andre.