Andy has 50 stickers. Danny has 40 stickers. How many more stickers does Andy have than Danny?

The correct answer is: 10

The number of stickers with Andy = 50
The number of stickers with Danny = 40
50 – 40 = ?
Start at 50 and count back by 10s four times to subtract 40.
50, 40, 30, 20, 10
50 – 40 = 10
So, Andy has 10 more stickers than Danny.