Adding Fractions
1/6 + 2 1/4 = _____
2 5/12
1 1/5 - 3/10
9/10
1/3 of 27
27/3 or 9
Which is a better buy? Explain your thinking using words, numbers, or sketches.
4 cans for $3 or 8 cans for $6?
Both purchases are the same price per can. 3/4 and 6/8 are equivalent fractions. Both are $0.75 per can.
1 5/6 + _____ = 2
1/6
5/6 + 1/3 = _____
1 1/6
5/6 – 1/3 = _____
9/18 or 3/6 or 1/2 or
1/12 X 60
60/12 or 5
Abby is 5 1/2 feet tall. Craig is 5 1/3 feet tall. Who is taller? How much taller?
Abby is taller
5 1/2 - 5 1/3 = 5 3/6 -5 2/6 = 1/6
1/6 taller
_____ + 5/8 = 3/4
1/8
Write equivalent fractions with common denominators and use them to add the fractions.
1/2 + 1/3 = _____ + _____ = _____
3/6 + 2/6 = 5/6
Write equivalent fractions with common denominators and use them to subtract the fractions.
3/5− 4/10 = _____ – _____ = _____
3/5 - 2/5 = 1/5
6/10 - 4/10 = 2/10 or 1/5
30/50 - 20/50 = 10/50 or 1/5
3 /4 of 60
45
Mark drove 3/4 of a 36 km trip before he stopped to get gas for his car. How many kilometers had Mark driven at that point? Show your work using words, numbers, or labeled sketches.
3/4 X 36 = 27 km.
3 1/4 − _____ = 1
2 1/4
Write equivalent fractions with common denominators and use them to add the fractions.
3 4/15 + 2 1/3 = _____ + _____ = _____
3 4/15 + 2 5/15 = 5 9/15 or 5 3/5
Write equivalent fractions with common denominators and use them to subtract the fractions.
10/16 – 5/8 = _____ – _____ = _____
10/16- 10/16 = 0
3/5 × 20
12
Shawn made a mix of lettuce seeds to plant. The mix has 1/2 cup of green leaf seeds, 2 2/3 cups red leaf seeds, and 1 1/4 cups bronze leaf seeds. How many cups of seeds does Shawn have to plant? Show your work.
1/2 + 2 2/3 + 1 1/4 = 6/12 + 2 8/12 + 1 3/12 =
4 4/12 cups of seeds to plant
3 2/3 + ___ = 4
1/3
3 1/9 + 2 1/4=
3 4⁄36 + 2 9⁄36 = 5 13⁄36
3/5 − 1/7 =
21⁄35 - 5⁄35 = 16⁄35
2/3 of 18
12
Andrea worked out by walking and running on a park trail. She walked 2/5 of the trail and then ran 1/4 of the trail.
a. How much of the trail had she covered? Show your work.
b. Did Andrea walk farther or run farther?
c. How much farther? Show your work.
a. Andrea covered 13/20 of the trail.
2/5 + 1/4 = 8/20 + 5/20 = 13/20
b. Andrea walked further.
c. Andera walked 3/20 or the trail farther than she ran. 8/20 - 5/20 =3/20
____ + 2/3 = 5/6
1/6