Assessment For The California Mathematics Standards Booklet - Grade 7 Page 12
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37Assessment For The California Mathematics Standards
Grade 7
Let x = 3 and y = 2. Substitute to find the value of the expressions below:
AF 1.2
AF 1.2
AF 1.2
AF 1.2
AF 1.2
a.
y ( xy - 7 )
10
1
b. [2 (x + 5) -
(5x - 3)]
2
2
10
AF 1.3
AF 1.3
AF 1.3
AF 1.3
AF 1.3
Justify each equation below with one of the following properties: additive identity,
commutative property of addition, commutative property of multiplication, associative
property of addition, associative property of multiplication, or the distributive
property.
a) xy ( y + -y ) = xy (0)
_____________________________
b) y ( a + b ) = ya + yb
_____________________________
c) y ( a + b ) = ( a + b ) y
_____________________________
d) ( 2 + x ) + y = 2 + ( x + y )
_____________________________
e) xy + y = y + xy
_____________________________
f) y [( x + y ) z] = [y ( x + y )] z
__________________________________________________
11.
Los Angeles County Office of Education: Mathematics
National Center to Improve the Tools of Education
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