Question

Calcule o valor das expressoes
18-(-12+3-7-4)-1
60-21-(18+42)-(1+9)
(8-4+3)-1+(-2+4+3-5)
(-6-4+10)+3-(1-2-3)

Answer 1

18-(-12+3-7-4)-1
     18-(-20)-1
          38-1
            37
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60-21-(18+42)-(1+9)
     60-21-(60)-(8)
           60-89
             -29
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(8-4+3)-1+(-2+4+3-5)
         (7)-1+(0)
               6
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(-6-4+10)+3-(1-2-3)
        (0)+3-(-4)
             7

Answer 2

18-(+20)-1
18-20-1
-3

39-(+60)-(+10)
39-60-10
31

(+7)-1(0)
7-1
6

(0)+3-(-4)
3+4
7