3 lb 9oz + 5lb 10 oz. tyytt

Answer: 9lb 3oz

Step-by-step explanation:

1. Add the pounds together first: 8lb

2. Then the ounces but there is over 16 ounces and 16 ounces make a pound. There is 19 ounces. So you can make ONE extra pound out of the 19 ounces. You would subtract: 19-16.

3. You have 3 left over: You can't make another pound so leave it as it is.

4. Add the extra pound to the 8 pounds and you have 9.

5. Then put the ounces with it and the answer is : 9lb 3oz