Variable expressions Worksheet

Find the value of the expressions for the given values of the variable(s).

1 a.   1.4(–5 a + (–2)), when a = 7.4
   
 
 
 
 
1 b.  
z – 3  , when z = 0.6
7
   
 
 
 
 
2 a.  
g – (–2.2)  , when g = –9.2
–0.2
   
 
 
 
 
2 b.  
–1.9 ba  , when b = 1.3 and a = 6.1
6
   
 
 
 
 
3 a.  
w – 7  , when w = –9.1
–5
   
 
 
 
 
3 b.   –5.8(–5.1 r – (–4)), when r = –3.2
   
 
 
 
 
4 a.   (–5.3 r – (–1.6))2, when r = 3.5
   
 
 
 
 
4 b.  
k – 6  , when k = –7.2
6
   
 
 
 
 
5 a.  
–7 – c  , when c = 9
–4.8
   
 
 
 
 
5 b.  
5 b  , when b = –4.1
2.5
   
 
 
 
 
Page 2

Answer Key



Answers with decimals have been rounded to 3 decimal digits.
1 a.  -54.6

 
1 b.  -0.343

 
2 a.  35

 
2 b.  -1.428

 
3 a.  3.22

 
3 b.  -117.856

 
4 a.  287.3025

 
4 b.  -2.2

 
5 a.  3.333

 
5 b.  -8.2

 


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