Question

Which equations support the fact that rational numbers are closed under addition? Select each correct answer.  

3√5+√5=4√5

√10+(-√10)=0

1/2 +0.5=1

3√16 + 3√16=6√16

Answer 1

• 1/2 +0.5=1
• 3√16 + 3√16=6√16

Explanation:

You can eliminate the equations that contain irrational numbers (√5, √10). Those that are left involve addition of rational numbers.