Val picks 50 strawberries. She gives 20 of them to her brother. How many strawberries are left with Val?

The correct answer is: 30

The number strawberries picked by Val = 50
The number of strawberries given to her brother = 20
The number of strawberries left with Val = 50 – 20
50 – 20 = ?
Start at 50, and count back by 10s two times to subtract 20.
50, 40, 30
50 – 20 = 30
So, 30 strawberries are left with Val