Ratio
A comparision of two numbers using the same measurement is a ____________________
ratio
The most common way to write a rate is in the _____________ form
fraction
Is 1:2 equivalent to 2:4?
Yes
The second term in every unit rate will always be
ONE
Sometimes considered unlucky, this is actually the most popular two-digit number.
13
Give the complete list of ways to write a ratio
as a fraction, with a colon, using the word 'to'
( all in simplest form, of course!)
A key vocabulary word that signals 'rate' is _____
per
Is 3:4 equivalent to 8:6?
No!
30 km per 4 hours as a unit rate is ______.
7.5 km / 1 hour
seven
Give the 3 types of ratios
part to part
part to whole
whole to part
A primary difference between a ratio and a rate is ___________.
rate = compares two numbers of different measurements
Give one mathematical method to find an equivalent ratio
Mulitplication - scale up
or
Division - scale down
Walmart has a sale on soda 3 cans for $5. How much is 1 can?
$1.67
two
Write the ratio of 6 apples to 8 oranges in every form.
6:8 = 3:4, 6 to 8 = 3 to 4, and 6/8 = 3/4
A car travels 92 miles in 5 hours. Write this as a rate.
92/5
92 miles/ 5 hours
92 miles per 5 hours
When writing equivalent ratios in a table, the first thing you must identify is the __________ factor.
Scale
Mike paid $68 for 4 pizzas. How much did he pay for each pizza?
$17 per pizza
This is the only number that has the same number of letters as its meaning.
four
There are 15 girls and 12 boys in a class. Write the following ratios and simplify by dividing to making equivalent ratios:
a) compare the boys to the girls
b) compare the girls to all students
a) 12:15 = 4:5
b) 15:27 = 5:9
When we write rates we must also include this every time we write the rate
the units or measurement
Is $12/162 pencils equivalent to $36/486 pencils?
YES!
3 batteries cost $4.80 or 12 batteries for $14.76 - which is the better buy?
$14.76/12 = $1.23 per battery
( $4/80/3 = $160 per battery)
He was a famous Greek mathematician most know for his famous theorem to help us figure the length of the sides of a right triangle.
Pythagoras