Fraction Operations
Unit Rates
Reciprocal
Unit Rates with Fractions
Brain Teasers
100

What is 3/4 x 8/9 ?

 2/3

100

Find the unit rate for: 150 miles in 6 gallons

25 miles per gal

100

The reciprocal of 1/6

What is 6

100

You walk 1/5 of a mile in 1/10 of an hour. What is your unit rate?

 2 miles per hour

100

Why are ghosts bad at lying?

Because you can see right through them.

200

1/7 divided by 5/49

7/5 or 1 and 2/5

200

Find the unit rate for: 105 students in 3 classes

35 students per class

200

The reciprocal of 4/7

What is 7/4

200

You eat 1/5 of a cake in 1/9 of a minute. What is your unit rate?

9/5 or 1 and 4/5 cake per minute (you really love cake).

200

What is always in front of you but can’t be seen?

The future

300

3/8 divided by 9/24

1

300

Find the unit rate for: 8 sunny days in 3 months

2.67 or 2 and 2/3 sunny days per month

300

What is the reciprocal of 4.25/3.2

3.2/4.25

300

You can type 2/9 of a letter in 1/3 of an hour. What is your unit rate?

2/3 of a letter in one hour.

300

People make me, save me, change me, raise me. What am I?

money

400

1 and 3/8 divided by 5 and 1/2

1/4

400

Find the unit rate for: $99 for 12 CDs

$8.25 per CD

400

What do you multiply 9/13 by so it will equal 1?

13/9

400

You can run 5/6 of the way around the track in 1/4 of an hour. What is your unit rate?

10/3 or 3 and 1/3 laps per hour.

400

The more you have of it, the less you see

darkness

500

2 and 5/8 divided by 4 and 2/3

9/16

500

Choose the better buy: $21.50 for 4 pounds of lunch meat OR $15.10 for 3 pounds of lunch meat

$15.10 for 3 pounds of lunch meat

500

What is the reciprocal of 5 and 1/6?

6/31

500

You can eat 3/8 of a burrito in 7/12 of a minute. What is your unit rate?

9/7 or 1 and 2/7 of a burrito in a minute (you're a professional burrito-eater)

500

If only these letters were written down—J FM AM J JAS OND—what would they mean?


the first letter for every month of the year

M
e
n
u