Add Fractions
3/10 + 5/10 =
8/10
5/6 - 1/6 =
4/6
2 4/10 + 5 5/10 =
7 9/10
7 5/8 - 2 4/8 =
5 1/8
What is the golden rule of fractions?
The denominator never changes when adding and subtracting fractions.
7/12 + 2/12 =
9/12
6/8 - 4/8 =
2/8
5 + 3 1/8 =
8 1/8
4 1/2 - 2
2 1/2
What is one way to decompose 7/8?
SAMPLE: 5/8 + 1/8 + 1/8
1/3 + 1/3 =
2/3
9/12 - 4/12 =
5/12
1 7/8 + 1 2/8 =
3 1/8
5 - 2 1/3
2 2/3
What are 7/4, 3/2, 12/10, and 8/6 examples of?
Improper Fractions
1/6 + 2/6 + 3/6 =
6/6 or 1
1/2 - 1/2 =
0
3 2/6 + 2 5/6 =
6 1/6
9 2/4 - 6 3/4 =
2 3/4
What is one way to decompose 3 1/2?
SAMPLE: 1 + 1 + 1 + 1/2
1/10 + 2/10 + 4/10 =
7/10
40/10 - 20/10 =
20/10 or 2
3 4/5 + 4 1/5 =
8
6 3/10 - 1 8/10
4 5/10
Erica is knitting a scarf. She has knitted 1 2/3 feet so far. She needs to knit another 3 2/3 feet. What will the length of the completed scarf be?
5 1/3 feet