Understanding Addition Facts with Plus One

What is the result of adding one to the number three?

• Four

• Six

• Five

• Three

If the sum is seven, what number was added to one?

• Eight

• Seven

• Six

• Five

What number plus one equals ten?

• Nine

• Eight

• Eleven

• Ten

Which number, when added to one, results in two?

• One

• Two

• Three

• Zero

What is the next counting number after adding one to eight?

• Ten

• Nine

• Eight

• Eleven