7th Grade Math

Test PracticeT

Lesson 1D Expressions 41

42. Which expression can be written as
    6 ( 9 + 8 )?
    A. 8 · 6 + 8 · 9 C. 6 · 9 · 6 · 8
    B. 6 · 9 + 6 · 8 D. 6 + 9 · 6 + 8


43. The model below represents the area of
    patio and a new addition to the patio.

12 yd 5 yd

7 yd

Which represents the area in square

yards of the entire patio?

F. 12(7 + 5) H. 5(19)

G. 7(12 + 5) I. 5(12) + 5(7)

44. EXTENDED RESPONSEThe table
    shows the driving distance from
    certain cities.

From To Distance (mi)Driving

Pittsburgh Johnstown 55

Johnstown Allentown 184

Part A Write a sentence that

compares the mileage from Pittsburgh

to Johnstown to Allentown, and the

mileage from Allentown to Johnstown to

Pittsburgh.

Part B Name the property that is

illustrated by this sentence.

2(3x - 2) = 6 x - 2

37. OPEN ENDED The Multiplication Property of Zero states that when any
    number is multiplied by zero, the product is zero. Write an equation that
    supports this property.


38. FIND THE ERROR Dario rewrote
    the expression shown. Find
    his mistake and correct it.


39. NUMBER SENSE Analyze the statement ( 18 + 35 ) × 4 = 18 + 35 × 4. Then
    tell whether the statement is true or false. Explain your reasoning.


40. CHALLENGE A counterexample is an example showing that a statement is
    not true. Provide a counterexample to the following statement.
    Division of whole numbers is associative.


41. E WRITE MATH Explain the importance of applying properties of
    operations when simplifying expressions.

C

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