Respuesta :

I had 50 apples. I ate half of them. My dog sneaked in my room later that day and ate 7. How many apples do I have left.

50÷2-7
Sally needs to get some money for a new toy.  She already has $10.  She needs to get $100.  She gets $30 every time she babysits her sister.  How will it take until she can get $100?