Question

Resolva essas expressões aritméticas
1) 12 + 8 + 20 – 30 - 8
2)5-5 - (2 + 6) - 1
5 + 6 . (2 + 5) - 10
33 + {2 . 7 - [6 + (10 – 2 x 4) + 1] + 16} – 49 + 1
{21 + [7 x (33 - 22) - 50] : (9 . 3)} : 11 + 8

Answer 1

Resposta:

Explicação passo-a-passo:

1)

= 12 + 8 + 20 – 30 - 8

= 20 + 20 - 38

= 40 - 38

= 2

______________

2)

= 5-5 - (2 + 6) - 1

= 0 - (8) - 1

= - 8 - 1

= - 9

______________

= 5 + 6 . (2 + 5) - 10

= 5 + 6.7 - 10

= 5 + 42 - 10

= 47 - 10

= 37

______________

= 33 + {2.7 -[6+(10-2x4)+1]+16}- 49+1

= 33+{14 - [6+(10-8)+1]+16} - 48

= 33+{14 - [6+2+1] + 16} - 48

= 33+{14 - [9] + 16} - 48

= 33 + {14-9+16} - 48

= 33 + {5+16} - 48

= 33 + 21 - 48

= 54 - 48

= 6

__________

= {21 +[7 x (33-22) - 50] : (9.3)} : 11+8

={21+[7.11 - 50] : 3} : 11 + 8

={21+[77-50] ÷ 3} ÷ 11 + 8

={21+27÷3} ÷ 11 + 8

= {21+9} ÷ 11 + 8

=30/11 + 8

= (30+11.8)/11

= (30+88)/11

= 118/11