resolva as expressões numéricas a seguir
a) 5/6+1/3×12/8
b) 4-2/9×3/5
c) 2/5×(4/3+1/6-3/12)
Soluções para a tarefa
Resposta:
Explicação passo-a-passo:
.
a) 5/6 + 1/3 . 12/8 = 5/6 + 1/3 . 3/2
. = 5/6 + 3/6
. = (5 + 3)/6
. = 8/6 = 4/3
.
b) 4 - 2/9 . 3/5 = 4 - 2 . 3 / 9 . 5
. = 4 - 2 . 1 / 3 . 5
. = 4 - 2/15
. = 60/15 - 2/15
. = (60 - 2)/15
. = 58/15
.
c) 2/5 . (4/3 + 1/6 - 3/12) = 2/5 . (16 + 2 - 3)/12
. = 2/5 . (18 - 3)/12
. = 2/5 . 15/12
. = 2/5 . 5/4
. = 2 . 5 / 5 . 4
. = 10 / 20
. = 1/2
.
(Espero ter colaborado)
Resposta:
A)
5/6 + 1/3 × 12/8
5/6 + 1/3÷3 × 12÷3/8
5/6 + 1/1 × 4/8
5/6 + 4/8
5/6 + 4÷4/8÷4
5/6 + 1/2
5+3/6
8/6
8÷2/6÷2
4/3
1,333...
B)
4 - 2/9 × 3/5
4 - 2/9÷3 × 3÷3/5
4 - 2/3 × 1/5
4 - 2/15
60-2/15
58/15
3,866...
C)
2/5 × (4/3 + 1/6 - 3/12)
2/5 × 16+2-3/12
2/5 × 15/12
2/5 × 15÷3/12÷3
2/5 × 5/4
2/5÷5 × 5÷5/4
2/1 × 1/4
2 × 1/4
2÷2 × 1/4÷2
1 × 1/2
1/2