Group 4 - BGB (02/22/22)

​Rates

​

a ratio with different units​

​

• ​has units in the form of a fraction

• read as A per B

• ​a rate with a denominator of 1

• When we say "4 meters per second," we mean 4 meters per 1 second."

• In calculating a unit rate with the units A/B, divide the quantity with unit A by the quantity with unit B.

[ 33 miles / 3 hours ]

= [ (3 x 11 miles) / (1 x 3 hours) ]

​= 11 miles/hour

• can be applied to speed and unit price.

• can be used to calculate total distance and total cost.

​Applying Unit Rates

​

48 dollars ➗ 96 rolls = 0.5 dollars

Sol​ution:

Craig bought 96 rolls or toilet paper for 48 dollars. What is the cost of a single roll of toilet paper?​

​= 900 flicks

Sol​ution:

While eating ants, a giant anteater flicks its tongue 150 times per minute. At this rate, how many times does the giant anteater flick its tongue in 6 minutes?​

150 flicks​

minute

x

6​

minutes

​= 600 times

Sol​ution:

A mouse's heart beats 900 times in 1.5 minutes. At this rate, how many times does the mouse's heart beat in 10 minutes?​

900 times

1.5 minutes

​= 6,000 times

600 times x 10 minutes

Sol​ution:

The prices of items at Bob's Burgers are shown in the table above. If Teddy orders 3 burgers and 2 fries, what is the total cost of his order?​

$21 + $6

= $27​

$7 x 3 burgers ​= $21

$3 x ​2 fries = $6

GRADE FIVE AND GRADE TWELVE

Group 4: Keane, Nathan, Matthiu, Miji, Jules, Desiree​

Thank you!​

February 22, 2022 ​