Fraction fun

Adding fractions

100

3/5 + 7/5 

10/5 or 2 

200

6/12 + 3/12 

9/12

300

7/8 + 1/8

8/8 or 1 

400

6/10 + 9/10

15/10 or 1 5/10 or 1 1/2

500

2/10 + 4/10 + 4/10

10/10 or 1

Decomposing fractions

100

4/9 using 2 addends 

2/9+ 2/9

1/9 + 3/9

200

7/12 using 2 addends

5/12 + 2/12 

6/12 + 1/12

3/12 + 4/12 

300

8/16 using 2 addends

6/16 + 2/16

7/16 + 1/16 

4/16 + 4/16

5/16 + 3/16

400

15/30 using 3 addends

Answers may vary.

Ex: 10/30 + 2/30 + 3/30

7/30 + 7/30 + 1/30

500

20/50 using 3 addends

Answers may vary

Ex: 15/50 + 3/50 + 2/50

Subtracting fractions

100

5/10 - 3/10

2/10

200

15/20 - 5/20

10/20 or 1/2 

300

35/50 - 15/50

20/50

400

75/100- 20/100 - 5/100

50/100 or 1/2

500

30/40 - 5/40 - 5/40 

20/40 or 1/2

Multiplying a fraction by a unit fraction

100

4 x 1/5 

4/5

200

10 x 1/80

10/80

300

20 x 1/20

20/20 or 1 

400

25 x 1/50

25/50 or 1/2 

500

30 x 1/45

30/45

Multiplying a fraction by a non-unit fraction

100

2 x 2/5

4/5

200

5 x 3/15

15/15 or 1

300

7 x 3/30

21/30

400

9 x 5/50

45/50

500

12 x 2/48

24/48