Solve to find the unknown. Joseph had 12 graham crackers. He shared some with his friends, and now he has 4 left. How many graham crackers did Joseph share?
⊟= 8
7.
⊟= 9
⊟= 16
⊟= 15
Which subtraction equation does this number line show?
13. Solve to find the unknown. A noise in the woods startled 4 frogs and they fell off the log. Five frogs stayed on the log. How many frogs were on the log to start?
△= 1
△= 4
△= 5
△= 9
38
18
14. What number is 10 more than 28?
27
29
15. Which addition fact can help solve the following subtraction problem?