Variable expressions Worksheet

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

1 a.  
c – 1.2  , when c = –3.1
5.7
   
 
 
 
 
1 b.  
2  , when t = 1.2
1.8 – t
   
 
 
 
 
2 a.  
5 r + w  , when r = –1.4
2
   
 
 
 
 
2 b.  
–1 d + c  , when d = –2.1
–1
   
 
 
 
 
3 a.  
a – 7  , when a = 3.5
4
   
 
 
 
 
3 b.   –7 s + 4 w + 8, when s = 9 and w = 8.4
   
 
 
 
 
4 a.   (–1.8 + 1.9 x)3, when x = –1.7
   
 
 
 
 
4 b.  
t – (–6.8)  , when t = –3.7
–3
   
 
 
 
 
5 a.   (7 – (–8) q)3, when q = –5
   
 
 
 
 
5 b.  
4.1 – 6 a  , when a = 2.8
5
   
 
 
 
 
Page 2

Answer Key



Answers with decimals have been rounded to 3 decimal digits.
1 a.  -0.754

 
1 b.  3.333

 
2 a.  1.5

 
2 b.  -10.7

 
3 a.  -0.875

 
3 b.  -21.4

 
4 a.  -127.263527

 
4 b.  -1.033

 
5 a.  -35937

 
5 b.  -2.54

 


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