Hi! Here are notes on unit rates!
•A rate is a ratio that compares two quantities with different measures.
•A unit rate is when the ratio has a second term (a denominator) of one.
Calculating:
To calculate a unit rate, divide the numerator (1st number of a fraction) of the ratio by the denominator(2nd number)
•Hint : when dealing with costs, the money will be a numerator.
Some practice:
Ratio: $6 for 8 erasers:
6/8 divided by 2 equals 3/4
Then when you divide the fractions divide it by doing: 3 divided by 4 (4 outside 3 inside) which equals.... 0.75! So then your final answer will be $0.75 per eraser
•don’t forget the unit!
You can ask me for more examples :)
Answer:
Let's make "b" the amount in the account.
A withdrawal means a reduction in the balance. So we have
b - 40
You can travel 8km in one hour.
we know that in 5 hr you travel 400 km
then just divide 400/5=8
Here are the answers to numbers one and two
1 cm = 10 mm
1 cm^2 = 100 mm^2
0.6 cm^2 = 0.6 * 100 mm^2 = 60 mm^2