1) 4 . [( 9 . 12 – 14 . 7 ) : ( 15 – 5 . 2 )]= 2) 20 : 4 + 3 . 2 – 15 : 3= 3) [ 25 – ( 18 : 3 )]. { 5 – [ 18 – ( 4 . 5 – 4 )]}= 4) 38 + [( 143 : 11 + 7 ) – 5 . 2] = 5) 2 . [ ( 5 – 2 ) . ( 3 + 2 . 7 )] – 2 =
Soluções para a tarefa
1) 4 . [( 9 . 12 – 14 . 7 ) : ( 15 – 5 . 2 )]=
4 . [( 108 – 98 ) : ( 15 – 10 )]=
4 . [10 : 5]=
4 . 2=
8
2) 20 : 4 + 3 . 2 – 15 : 3=
5 + 3 . 2 – 5=
5 + 6 – 5=
11 – 5=
6
3) [ 25 – ( 18 : 3 )]. { 5 – [ 18 – ( 4 . 5 – 4 )]}=
[ 25 – 6]. { 5 – [ 18 – (20 – 4 )]}=
[ 25 – 6]. { 5 – [ 18 – 16]}=
19 . { 5 – 2}=
19 . 3=
57
4) 38 + [( 143 : 11 + 7 ) – 5 . 2] =
38 + [( 13 + 7 ) – 5 . 2] =
38 + [20 – 5 . 2] =
38 + [20 –10] =
38 + 10 =
48
5) 2 . [ ( 5 – 2 ) . ( 3 + 2 . 7 )] – 2 =
2 . [ 3 . ( 3 + 14 )] – 2 =
2 . [ 3 . 17] – 2 =
2 . 51 – 2 =
102 – 2 =
100
1) R: 8
2) R: 6
3) R: 57
4) R: 48
5) R: 100
espero ter ajudado!