Unit rates
What is unit rates (A unit rate means a rate for one of something. We write this as a ratio with a denominator of one. For example, if you ran 70 yards in 10 seconds, you ran on average 7 yards in 1 second. Both of the ratios,)
Unit rate :a comparison of a quantity to one unit of another quantitys
Home work :
1Q> Mary pays $60 for 5 piano lesions. What is the cost per lesson(unit rate) of each piano lesson?
Set up ration of fraction= first item / second item
The total cost of the lessons goes in the numerator while the number of lessons goes in the denominator.
60$ / 5 lessons
$60÷5/5÷5
Since the cost is in the numerator and the number of lessons is in the denominator; we can see that it costs $12 per lesson
2q>An auto club drove a new hybrid car 442.4 miles. They refilled the gas tank with 10.2 gallons of gas. How many miles per gallon did the hybrid car get?
Answer:
Create a ratio in fraction from to express the problem.
First item / Second item
The total number of miles driven goes in the numerator while the number of gallons used goes in the denominator.
442.4 miles / 10.2 gallons
Since the number of miles is in the numerator and the number of gallons is in the denominator; we can see how many miles the car can drive per gallon.
442.4 miles ÷ 10.2/10.2 gallons ÷ 10.2
1 gellon=43.37 miles
3Q> The cost of sandwiches is $19.50. What is unit price?
Answer:
To create the ratio in fraction form, one item must be in the numerator while the second item is in the denominator.
First item / Second item
Set up a fraction with the price in the numerator and the number of sandwiches in the denominator.
$19.50 / 3
We can see how much one sandwish will cost.
$19.5 ÷ 3 /3 ÷3
One sandwish cost is= 6.5
40 passengers in 10 cars , how many passengers each car?
Here we find the passengers in each car.
To create the ratio in fraction form, one item must be in the numerator while the second item is in the denominator
First item / second item
Set up a fraction is 40 passengers in the car and 10 cars in the denominator
40 ÷10/10 ÷10
4 members in each car.