Question

Resolva as seguintes expressões numéricas :
a) 15-(8-7)+(9-4)=

b) 12 -{-3+[1+(+2-9)-8]+5}=

Answer 1

Resposta:

a) 15-(8-7)+(9-4)=

15-(+1)+(+5)=

15-1+5=

14+5=

19

b) 12-{-3+[1+(+2-9)-8]+5}=

12-{-3+[1+(-7)-8]+5}=

12-{-3+[1-7-8]+5}=

12-{-3+[-14]+5}=

12-{-3-14+5}=

12-{-3-14+5}=

12-{-12}=

12+12=

+24