Quiz on Arianna's Staircase Problem

Arianna ran up 5 flights of stairs. She then down 5 flights of stairs. Write an addition equation to represent this situation.

• 5 + (-5) = 0

• 5 + 5 = 10

• 5 - 5 = 0

• 5 + 0 = 5

Javier spent $7.50 for breakfast on each of three days. On the fourth day, he found $20 lying on the sidewalk. On the fifth day, he bought a shirt for $18.72. What is the total change in the amount of money Javier had?

• -$2.22

• $2.22

• -$18.72

• $18.72

In the first round of a card game, Niki scored 20 points. Then, she lost 10 points on one turn and also lost 25 points on her final turn. What is Niki's final score?

• -15

• -5

• 5

• 15

Which number line demonstrates how to find the sum of 3 and –4?

• Number line A

• Number line B

• Number line C

• Number line D

A marathon is 26.2 miles long. There is a water station every 1 1/4 miles along the race route and at the finish line. How many water stations are needed for this marathon?

• 12

• 16

• 21

• 26