Adding and Subtracting Mixed Numbers

-8⅚ + -2⅕

• -11 1/30

• 11 1/30

• -10 6/11

• 10 6/11

• -1 1/3
• -2 2/3
• 3 1/3
• -3

• -18 2/3

• -17 13/24

• -18 13/24

• 1 19/24

What is -2 1/4 + 1 1/8 

• -1  1/2

•  -1  3/8

• -1  1/8

• -1  1/4

What do you need to do to solve this problem?

• Find common denominators (you can add the whole numbers and then the fractions)

• Change them to improper fractions always

• Just add straight across

solve

• 1 3/4

• - 1  1/2

• 1  5/12

• not here

Kingston made a pot of 29 1/2 C of gumbo. His family ate some for lunch. this changed the amount in the pot by -7 3/4 C. Then he gave his neighbors some gumbo. This changed the amount in the pot by -6 1/2 C. How many cups of gumbo are left in the pot?

-1 1/4  + -2 1/2 =  

• - 3 3/4

• - 3 1/4

• -2 3/4

• -3 1/2

The height of Yuan's lemongrass plant is 35 1/4 in. Yuan changes the height of the plant by -15 1/2 in. when she cuts its stalk to use in her grandmother's recipe for Vietnamese Lemongrass Chicken. Not long after the plant grows 4 3/4 in. What is the final height of Yuan's lemongrass plant?

• 19 3/4 in.

• 24 1/2 in.

• 32 1/4 in.

• 55 1/2 in.

solve

• 1  9/10

• 9/10

• - 1 9/10

•   - 9/10