can you solve these

What is 1/2 +1/2=?

• 2/4

• 4/8

• 1/2

There were 3 pizzas in total at the pizza shop. A customer bought 1 pizza. How many pizzas are left?

• 3

• 2

• 1

Your friend said she had 11 stickers. When you helped her clean her desk, she only had a total of 10 stickers. How many stickers are missing?

• 1

• 2

• 3

21+42=?

• 45

• 67

• 64

• 63

Adrianna has 100 pieces of gum to share with her friends. When she went to the park, she shared 10 pieces of strawberry gum. When she left the park, Adrianna shared another 10 pieces of bubble gum. How many pieces of gum does Adrianna have now?

• 90

• 70

• 80