Adding Fractions
3/5 + 4/5 =
7/5 or 1 2/5
5/11 - 2/11 =
3/11
2/5 x 1/2 =
2/10
5 ÷ 1/2 =
10
2/5 ÷ 1/2 =
4/5
2/7 + 1/3 =
13/21
1/2 - 1/5 =
3/10
3/8 x 2/5 =
6/40
1/3 ÷ 4 =
1/12
What are the 3 steps we follow to divide fractions?
Keep, change, flip
1/6 + 2/5 =
17/30
5/8 - 1/2 =
2/16
5/6 x 1/4 =
5/24
1/6 ÷ 7 =
1/42
Why do we need common denominators when we add and subtract fractions?
We need common denominators so that the pieces we are adding or subtracting are the same size.
2/5 + 1/3 =
11/15
3/4 - 2/3 =
1/12
4/10 x 4/5 =
16/50
8 ÷ 1/3 =
24
Use standard algorithm to solve: 45 x 23 =
1,035
4/5 + 3/4 =
31/20 or 1 11/20
4/7 - 2/5 =
6/35
7/10 x 5/10 =
35/100
10 ÷ 1/8 =
80
Solve using standard algorithm: 61 x 15 =
915