7th Grade Math

Test PracticeT

180 Rational Numbers

C 38. CHALLENGE What is twice 2^20? Write using exponents.

39. NUMBER SENSE Is^4

200

_

4199

greater than, less than, or equal to 4? Explain your

reasoning.

40. E WRITE MATH Does 3^2 + 35 have the same value as 3^2 · 35? Explain.

Divide. Write in simplest form. (Lesson 3D)

44. 1 ^1
    2
    ÷ ^3
    4
    45. 5 ÷ ^3
    4
    46. ^5
    6
    ÷ (- _^2
    3

(^) )

47. 
    
    
    
    • _^4
      5
    
    
    
    

÷ (^) (- ^1
5
(^) ) 48. 6 ^3
4
÷ 2 _^1
2

49. 
    
    
    
    • 3 ^2
      9
      ÷ ^1
      3
    
    
    
    


50. BAKING The table shows the amount of walnuts needed for
    making pumpkin bread. John made pumpkin bread using Mom’s
    recipe and used 6 cups of walnuts. How many batches of
    pumpkin bread did John make? (Lesson 3D)


51. MEASUREMENT Will doubled just the length of the rectangular ice
    skating rink in his backyard from 16 to 32 feet. That increased the
    area from 128 square feet to 256 square feet. Find the width of
    both rinks. Use the draw a diagram strategy. (Lesson 3C)

Order each set of numbers from least to greatest. (Lesson 1C)

52. ^2
    25
    , 9%, 0.089 53. ^7
    16
    , 44%, 0.38 54. _^2
    3
    , 65%, 0.69


53. Multiply 7xy and x^14 z.
    A. 7 x^15 yz
    B. 7 x^15 y
    C. 7 x^13 yz
    D. x^15 yz


54. Find the quotient of a^5 ÷ a.
    F. a^5
    G. a^4
    H. a^6
    I. a


55. SHORT RESPONSE What is the area
    of the rectangle?

7 x^6 ft^

6 x^3 ft^

Pumpkin Bread

Recipe Amount of

Walnuts

Mom’s^34 c

Cookbook’s 41 c

176_189_C3L4_895130.indd 180 12/31/09 12:50 PM