Let's Be Rational

Investigation 1

100

what is 2/4 + 1/4 equal?

3/4

200

Jonathan has 4/5 of a pound of chocolate chips. Arlene has 3/4 of a pound of chocolate chips. How many more pounds of chocolate chips does Jonathan have then Arlene?

4/5 - 3/4 16/20 - 15/20 = 1/20

300

What is 2 and 1/3 + 4 and 1/4 equal?

79/12= 6 and 7/12

400

What is the sum of 11 and 1/3 and 5/6?

12 and 1/6

500

Jimmy John Jean was making pancake mix. The total sum of the mix was 1 cup He added 1/4 cup of flour, 1/6 cup of butter, 1/8 cup of eggs, and ______ cup of chocolate chips. How many cups of chocolate chips does Jimmy John Jean use?

11/24

Investigation 2

100

What is 3/4 x 5/6?

15/24=5/8

200

What is 1 and 1/2 x  3/4?

9/8

300

What is the product of 1 and 1/3 and 2/3?

8/9

400

Mr. Alfano had 15 equal sized snowballs thrown at him. 8/9 of the snowballs stuck to his face. What fraction of the snowballs stuck to his face?

13 and 1/3

500

which is greater 3/4 x 5/6 or 7/8 x 7/9 or 11/12 x 2/3

7/8 or 7/9

Investigation 3

100

 3/4 divided by 1/2 is what?

6/4 or 1 1/2

200

What is 2 and 3/4 divided by 4 and 1/2?

11/18

300

what is 5/6 divided by 6?

5/36

400

what is the quotient of 10 and 1/3 and 5/6

12 and 2/5

500

James's mother bought 9 and 1/3 pounds of strawberries to make strawberry smoothies. she estimates that she will need 1/9 of a pound of strawberries for each smoothie. how many smoothies can she make with the strawberries she bought?

84 smoothies

Investigation 4

100

Give another sentences in this fact family

2 + 3 = 5

3 + 2 = 5

5 - 3 = 2

5 - 2 = 3

200

2 x N=12

6

300

N + 3/4=5/4

2/4

400

16 divided by 2/3= N

24

500

How many bows can you make from 30 and 2/3 meters of ribbon if 1/4 of a meter of ribbon makes one bow?

122 and 2/3

Random Random Math Stuff

100

What is the greatest common factor of 18, 36, and 45?

What is 9

200

 Mr. Alfano listened to One Direction Songs every 5 minutes. Ms. D listened to Beatles Songs every 9 minutes. If they both played a song at the same time at 10:00 A.M. when is the next time they will both listen to a song at the same time?

10:45 A.M.

300

What is 20% of 50?

10

400

11 + 3 x 5 - 5 x 2 + 3 x 5

31

500

Name 5 prime numbers larger then 150

151 157 163 167 173 179 181 191 193 197 199 211 223 227 229 233 239 241 251 257 263 269 271 277 281