Assessment

This section will assess how much you had learned in the lesson.

Directions: Read and analyze each item carefully. Choose the letter of your answer. Show your complete solution if necessary.

1. The temperature is 15°C and drops 8°C. Which of the following is the addition equation to calculate the final temperature? What is the final temperature? 

A. (+15) + (+8) = +9; 9°C C. (+8) + (+15) = +23; 23°C 

B. (+8) + (-15) = –7; –7°C D. (+15) + (-8) = +7; 7°C 

2. Bryan gets on an elevator at the 35th floor. The elevator goes down 17 floors then up 9 floors. At what floor does it finally stop?

A. 9 B. 27 C. 61 D. 43 

3. Let one white tile represent +1 and one black tile represent -1. Write the integer modelled by this set of tiles ?

4. Let one white tile represent +1 and one black tile represent -1. You have 10 black tiles. What tiles do you need to model 0?

A. 9 black B. 10 white C. 9 white D. 10 black

5. What is the difference of -28 and +3?

A. –31 B. +25 C. –25 D. +31