$2+2=$  

• 4

• 2

• 5

• none of the above

• all of the above

1

• two

• one

• oen

 $10+30=$  

 $20+20=$   $40$  

• true

• false

1,2,3,4

• one two

• five six

• thirty

• three four

30

• three

• thirteen

• thirty