Origo: Unit 8: Fractions

Relate unit fractions to division

100

1/3 of 24

8

200

1/10 of 90

9

300

1/7 of 56

7

400

1/4 of 36

9

500

1/12 x 72

6

Finding fraction of a whole number (unit fractions)

100

1/5 of 18

3 3/5

200

1/6 of 16

2 4/6 or 2 1/2

300

1/7 of 24

3 3/7

400

1/4 x 5

1 1/4

500

1/5 of 34

6 4/5

PEMDAS: Order of Operations

100

60 ÷ (24 x 1/4)

10

200

1/4 x 36 + 30

39

300

3/7 x (16 + 12)₌

12

400

3/4 x 16 x 4=

48

500

5/6 x (43-13)=

25

Finding fraction of a whole number (non unit fractions)

100

4/7 of 14

18

200

7/9 of 27

21

300

3/5 of 20

12

400

5/7 of 42

30

500

5/6 of 24

20

Word Problems

100

Cars are parked in 10 rows of 3 cars. Two-fifths of the cars are black. How many cars are black?

12 black cars

200

Eggs are inside a carton in 6 rows of 4. Three-fourths of the eggs are used for breakfast. How many eggs are used?

18 eggs

300

Samantha is running a 40 kilometer race. She passes a sign saying she is 2/3 of the way done. How many kilometers has she run so far?

80/3 =  26 2/3

400

Talia is driving to a town 50 miles away. She plans to stop 2/3 of the way for a break. How many miles will she have traveled? 

100/3= 33 1/3 miles

500

A baker has a 20-kg bag of raisins.  1/8 of the bag is used in each batch of cookies. How much is used for 5 batches of cookies?

12 1/2 kg