Students are selling raffle tickets to raise funds for new computers. The price of each ticket is $2.25. How much will 7 tickets cost?
The problem is asking us to multiply.
We multiply money the same way we multiply decimals.
You just add a dollar sign to your answer.
Let's try it.
The money amount that we need to multiply is $2.25.
We need to multiply $2.25 by 7 tickets.
$2.25 × 7
Let's use column form.
We write $2.25 at the top and 7 at the bottom.
Tip: When multiplying, you don't need to line up the decimal points, like you do with addition or subtraction.
Now, multiply 7 with the Hundredths place digit.
7 × 5 is 35.
Write 5 at the bottom. We carry 3 at the top of 2, the digit in the Tenths place.
Then we multiply 7 with the Tenths place digit.
7 × 2 is equal to 14. We add 3 to 14 and we get 17.
Write 7 at the bottom and carry the 1.
Now, we multiply 7 with the Ones place digit.
7 × 2 is equal to 14. We add 1 to 7 and we get 15.
We write 15 at the bottom.
We count the digits that are to the right of a decimal point.
There are 2 numbers after a decimal point.
That means we count two spaces from the right.
We land at the space between 5 and 7. That's where we put our decimal point.
Now, here is the final answer:
$2.25 × 7 = $15.75
Tip: Write the dollar sign before the numbers.
Excellent work.
Do you think you can multiply money on your own?
Try the practice to find out.