$7.00 − ($4.50 + $1.20)
Liam has seven dollars. He buys a comic for four dollars and fifty cents, and stickers for one dollar and twenty cents. How much money is left?
First, let's add up what Liam spent. We line up the decimal points so cents sit under cents.
Start on the right with the cents. Zero plus zero is zero.
Next, the dimes column. Five plus two is seven.
Now the dollars. Four plus one is five. Liam spent five dollars and seventy cents.
Now we subtract that from the seven dollars he started with. Line the decimal points up again.
Cents column first. Zero minus zero is zero.
We can't take seven dimes from zero dimes, so we borrow one dollar. The seven becomes six, and the dimes column becomes ten.
Now ten minus seven is three.
And six minus five is one dollar.
Liam has one dollar and thirty cents left. Great work using money math!