Variable expressions Worksheet

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

1 a.   2.5(4 – 8 c), when c = –4.5
   
 
 
 
 
1 b.  
r – (–6)  , when r = 5.1
–4
   
 
 
 
 
2 a.   –2.1(–3 v + (–3)), when v = –0.8
   
 
 
 
 
2 b.  
8 v  , when v = 6.4 and k = 1
k2
   
 
 
 
 
3 a.  
c – 5.9  , when c = 10.8
–3.5
   
 
 
 
 
3 b.  
n – (–6.8)  , when n = –9.5
–5.6
   
 
 
 
 
4 a.   (6.3 y – (–0.9))3, when y = 5.8
   
 
 
 
 
4 b.   (–2 r – 1)3, when r = –6.2
   
 
 
 
 
5 a.  
d – (–2)  , when d = 7.7
2.3
   
 
 
 
 
5 b.   (–6 s + (–7))3, when s = 7.8
   
 
 
 
 
Page 2

Answer Key



Answers with decimals have been rounded to 3 decimal digits.
1 a.  100

 
1 b.  -2.775

 
2 a.  1.26

 
2 b.  51.2

 
3 a.  -1.4

 
3 b.  0.482

 
4 a.  52481.654784

 
4 b.  1481.544

 
5 a.  4.217

 
5 b.  -155720.872

 


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