8.1
Write 8/12 in simplest form.
2/3
Use a common denominator to write an equivalent fraction for each fraction.
1/2 and 3/8
4/8 and 3/8
Add:
5/6 + 2/3=
3/2
Subtract:
3/4 - 1/8=
5/8
What is a common denominator?
A number that is the denominator of two or more fractions.
Write the fraction in simplest form:
7/14
1/2
Use a common denominator to write an equivalent fraction for each fraction.
7/9 and 2/3
7/9 and 6/9
Add:
1/6 + 1/4=
5/12
Subtract:
6/8 - 7/10=
1/20
The number above the line in a common fraction showing how many of the parts indicated by the denominator are taken.
Write the fraction in simplest form:
12/4
3
Use a common denominator to write an equivalent fraction for each fraction.
5/8 and 2/9
45/72 and 16/72
Add:
2/9 + 4/3 + 5/9=
19/9
Subtract:
5/6 - 1/4 - 3/12=
1/3
What is a proper fraction?
A fraction less than 1.
Three out of nine baseball players are in the outfield. In simplest form, what fraction of the players are in the outfield?
1/3
A mint plant grows 7/8 inch in 1 week and 13/16 inch the next week. Use a common denominator to write an equivalent fraction for each fraction.
14/16 and 13/16
Newton and Descartes find 1/2 + 1/6. Newton says the sum is 4/6. Descartes says the sum is 2/3. Who is correct? Explain.
Both:
The sum is 4/6 and 4/6 can be simplified to 2/3.
Why do fractions need a common denominator before you can add or subtract them?
So that the number of pieces that are being added or subtracted are all the same size.
What is an improper fraction?
A fraction greater than 1.
The numerator and denominator of a fraction have 1, 2, and 4 as common factors. After you divide the numerator and denominator by 2, the fraction is still not in simplest form, why?
If the numerator and denominator both are divisible by 4, then it can be reduced again by 2.
Some friends spend 1/3 hour collecting sticks and 5/6 hour building a fort. Do they spend the same amount of time on each? Explain.
No:
2/6 hour is spent collecting sticks.
2/6 < 5/6
Your friend buys 1/8 pound of green lentils and 3/4 pound of brown lentils. What fraction of a pound of lentils does she buy?
7/8 pound
Logic: find a.
7/10 - a = 1/2
1/5
Simplest form is when...
The numerator and denominator of a fraction have no common factors other than 1.