The Number System Unit Test
Math 8 Q1 (Pre-Algebra) / The Number System
A sign in a gas station advertises gas at the rate of $3.39 9/10 per gallon. How many dollars does a gallon cost, writing the price strictly as a decimal?(1 point)
To write the price strictly as a decimal, we can convert the fraction part to decimal form.
Since 9/10 is equivalent to 0.9 in decimal form, we can add it to the whole number part, $3.39, to find the total cost per gallon.
$3.39 + 0.9 = $<<3.39+0.9=4.29>>4.29
Therefore, a gallon costs $4.29.
To convert the mixed number to a decimal, follow these steps:
Step 1: Rewrite the whole number part without changing it.
In this case, the whole number part is 3.
Step 2: Convert the fraction part to a decimal by dividing the numerator (9) by the denominator (10).
To do this, divide 9 by 10:
9 ÷ 10 = 0.9
Step 3: Combine the whole number part and the decimal part.
The whole number part is 3, and the decimal part is 0.9.
So, the decimal representation of the mixed number 3 9/10 is 3.9.
Therefore, the gallon of gas costs $3.90.