Variable expressions Worksheet

Evaluate the expressions for the given values of the variable(s).

1 a.  
u – (–5)  , when u = 4.1
7
   
 
 
 
 
1 b.  
n – 1.2  , when n = –9.3
8
   
 
 
 
 
2 a.   (–6.4 + (–7.2) x)3, when x = 2.3
   
 
 
 
 
2 b.  
x – (–0.4)  , when x = 0.9
–7.7
   
 
 
 
 
3 a.  
x – 8.7  , when x = –10
–7.8
   
 
 
 
 
3 b.  
t – 6  , when t = 10.4
8
   
 
 
 
 
4 a.  
t – 1.7  , when t = 3.5
–7.6
   
 
 
 
 
4 b.  
s – (–5)  , when s = 4.1
–7.6
   
 
 
 
 
5 a.  
3  , when a = –2
4 a
   
 
 
 
 
5 b.   (–4 g – 4.6 u)2, when g = –3.2 and u = 2.2
   
 
 
 
 
Page 2

Answer Key



Answers with decimals have been rounded to 3 decimal digits.
1 a.  1.3

 
1 b.  -1.313

 
2 a.  -12103.630336

 
2 b.  -0.169

 
3 a.  2.397

 
3 b.  0.55

 
4 a.  -0.237

 
4 b.  -1.197

 
5 a.  -0.375

 
5 b.  7.1824

 


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