Adding and Subtracting
Fractions
Fractions
14. Max is earning money to pay for his new trumpet. He earned 2/5 of the money he needed last week and 1/5 of the money this week. What fraction of the money has he earned?
2/5+1/5=3/5
of the money he needs
What is the sum of
2 1/7 and 3 2/7?
5 3/7
What is the difference:
4 5/6 - 3 4/6 =
1 1/6
Look at problem # 10 on your review:
What mixed number does this model show
3 1/4
Simplify 25/100
1/4
6. Manny used the computer for 2/10 of his time before school, and 3/10 of his time after school. How much of his time was spent on the computer?
2/10+3/10=5/10
5/10=1/2 of his time
What is the sum of
2 1/5 and 3 4/5?
6
What is the difference?
5 - 3 1/2 =
1 1/2
Look at Problem #1 on your review.
Paul found that 2/8 + 5/8= 7/8
What is another way to show 7/8?
1/8+1/8+1/8+1/8+1/8+1/8+1/8
D
20. List all the factors of 36
1,36 2,18 3,12 4,9 6,6
1,2,3,4,6,9,12,18,36
9. The average length of an adult Rough Green snake is 5/6 yard. The length for a Eastern Green snake is 4/6 yard. How much longer is a Rough Green snake than an Eastern Garter Snake?
5/6-4/6=1/6 yard
4. What is the sum of
4 5/6 + 3 5/6?
8 4/6 = 8 2/3
11. Marie needs 2 2/8 yards of fabric. She already has 1 3/8 yards of fabric. How many more yards of fabric does she need?
2 2/8 - 1 3/8 =
7/8 yards
Look at problem #5 on your review...
Which equation is represented on the number line shown?
6/10 + 2/10 = 8/10
8/10 = 4/5
19. List the following fractions in order from least to greatest.
1/ 2 7/8 1/6
4/24, 12/24, 21/24
3. Rick made a paper football that was 7/8 inch long. Carly made one that is 5/8 inch long. How many inches longer is Rick's paper football than Carly's?
7/8-5/8=2/8
2/8=1/4 inch
13. What is the sum of:
1 7/8 + 2 3/8 =
4 2/8 = 4 1/4
7. Sean made a ribbon that was 3 1/6 inches long. Fran made one 1 5/6 of an inch long. How much longer was Sean's ribbon than Fran's?
3 1/6 - 1 5/6 =
1 2/6 = 1 1/3 inches
16. Ray is kayaking down a 7/12 mile stream. He stops for lunch after kayaking 3/12 of a mile. How much farther does he need to travel?
Draw a picture and write an equation to solve.
7/12- 3/12 = 4/12
4/12=1/3
MUST ALSO HAVE A PICTURE
Look at problem #17 on your review
25 x 71 =
1,775
2. On Friday, 3/12 of the students in a class were absent. What fraction of the students attended class? (12-3)
12/12-3/12=
9/12=3/4 of the students
8. The Smith's went on a 600 mile trip. On the first day they drove 5 3/4 hours and on the second day they drove 4 3/4 hours. How many hours did they drive during the first two days?
10 2/4 = 10 1/2 hours
12. Tracey is at school for 7 1/4 hours each day. One day the school lets out early. She is at school for only 3 3/4 hours that day. How much longer is a regular school day? SIMPLIFY!
7 1/4 - 3 3/4=
3 2/4 = 3 1/2 hours
15. Roger and Su were finding ways to show the mixed number 1 1/6 as an addition of fractions. Roger wrote: 1/6 + 1/6 + 2/6 + 3/6 = 1 1/6 Su said Roger must be wrong because he added: 3/6 + 4/6 = 1 1/6
Is Sue correct in his thinking? Explain.
Su is incorrect because Roger is also correct, they both equal 7/6 which is the same as 1 1/6.
Look at #18 on your math review.
Solve.
939 R3