1. 8-7 Adding Mixed
Numbers
Number Sense 2.3

3. 1 2 +
3 1 1
1 +
4
1
6

4. 1
2 x4
= 12
3 x4
1
3: 3, 6, 9, 12, 15
1 x3
= 12
4 x3
4: 4, 8, 12, 16, 20
6: 6, 12, 18, 24, 30
1 1 x2 LCD = 12
= 12
6 x2

5. 1
2 x4 STEP ONE: Find the LCD
= 12
3 x4
The LCD is the LCM of the
denominators.
1
3: 3, 6, 9, 12, 15
1 x3
= 12
4 x3
4: 4, 8, 12, 16, 20
6: 6, 12, 18, 24, 30
1 1 x2 LCD = 12
= 12
6 x2

6. 1
2 x4 STEP ONE: Find the LCD
= 12
3 x4
The LCD is the LCM of the
denominators.
1
3: 3, 6, 9, 12, 15
1 x3
= 12
4 x3
4: 4, 8, 12, 16, 20
6: 6, 12, 18, 24, 30
1 1 x2 LCD = 12
= 12
6 x2
STEP TWO: Write equivalent
fractions using the LCD