Mixed Numbers
Turn to mixed number
3/2
2/2+1/2=1 1/2
2/5+3/5
5/5=1
7/15-2/15
5/15=1/3
When adding or subtracting fractions, do you add or subtract the denominators?
Never add or subtract the denominators
What do you do to find the common denominator?
Ladder
Turn to improper fraction
2 3/7
(2xx7+3)/7=(14+3)/7=17/7
3 1/7+4/7
3 5/7
11/18-5/18
6/18=1/3
When adding or subtracting fractions, do you add or subtract the numerators?
Add or subtract the numerators
What numbers can always be divided by 2?
Even numbers
Turn to mixed number
14/3
12/3+2/3=4 2/3
1/12+5/12
6/12=1/2
1/4-1/6
3/12-2/12=1/12
What do you have to do about the denominator when adding or subtracting fractions?
Find the common denominator
What numbers can always be divided by 5?
Any numbers end with a 0 or 5.
Turn to improper fraction
3 5/6
(3xx6+5)/8=(18+5)/8=23/6
1/2+1/3
3/6+2/6=5/6
1 1/8-5/8
9/8-5/8=4/8=1/2
When doing fractions, what operations require common denominator?
Addition and Subtraction
What numbers can always be divided by 3?
Turn to mixed number
69/8
64/8+5/8=8 5/8
2/3+3/4
8/12+9/12=17/12=1 5/12
2 1/6-1/3
1 7/6-2/6=1 5/6
What is the invisible sign between the whole number and the proper fraction in a mixed number?
Addition
What numbers can always be divided by 9?
Any numbers whose digits add to a multiple of 9