7th Grade Math

Test PracticeT

108 Integers

C 42. OPEN ENDED Write a multiplication sentence with a product of -18.

43. NUMBER SENSE Explain how to evaluate each expression as simply
    as possible.
    a. (-9) (-6) (15) (- 7 + 7) b. (-15) (-26) + (-15) (25)


44. CHALLENGE Evaluate (-1)^50. Explain your reasoning.


45. E WRITE MATH Explain when the product of three integers
    is positive.


46. ANT FARMS The table below shows the number of ants in an ant
    farm on different days. The number of ants doubles every ten days.
    (Lesson 3A)

Day 51 61 71

Number of Ants 320 640 1,280

a. How many ants were in the farm on Day 1?

b. How many ants will be in the farm on Day 91?

49. VIDEO GAMES Nieves and her three friends are playing a video game. Player Score
    Nieves - 189
    Polly - 142
    Saul 230
    Harry - 48

The table shows their scores at the end of the first round.(Lesson 2D)

a. What is the difference between the highest and lowest scores?

b. By how many points is Nieves losing to Polly?

Add. (Lesson 2B)

50. 
    
    
    
    • 12 + (-19) 51. - 8 + (-11) 52. - 5 + 6 53. 7 + (-11)
    
    
    
    
    
    
    46. The temperature drops 2 degrees per
        hour for 3 hours. Which expression
        does NOT describe the change in
        temperature?
        A. - 2(3)
        B. - 2 + (-2) + (-2)
        C. - 2 - 2 - 2
        D. 2(3)
    
    
    47. GRIDDED RESPONSE Which number
        is the seventh number in the sequence
        shown?
    
    
    
    

Position 1234 567

Number 1 - 24 - 816??

102_113_C2L3_895130.indd 108 12/29/09 12:50 PM