Question

1- Efetue as operações e apresente a resposta na forma simplificada

a) 3÷5 + 5÷4

b)3÷5 + 6÷2

c)2÷5 + 4÷8

d)4÷7 + 2÷6

e)5÷3 + 5÷6​

Answer 1

Resposta:

Explicação passo a passo:

1- Efetue as operações e apresente a resposta na forma simplificada

a) 3÷5 + 5÷4

= 3/5 + 5/4

Mmc (5,4)=20

= (4.3+5.5)/20

= (12+25)/20

= 37/20

____________

b)3÷5 + 6÷2

= 3/5 + 6/2

= 3/5 + 3

= (1.3+5.3)/5

= (3+15)/5

= 18/5

____________

c)2÷5 + 4÷8

= 2/5 + 4/8 (:4)/(:4)

= 2/5 + 1/2

= (2.2+5.1)/10

= (4+5)/10

= 9/10

___________

d)4÷7 + 2÷6

= 4/7 + 2/6 (:2)/(:2)

= 4/7 + 1/3

Mmc (7,3)= 21

= (3.4 + 7.1)/21

= (12+7)/21

= 19/21

____________

e)5÷3 + 5÷6​

= 5/3 + 5/6

Mmc (3,6)= 6

= (2.5+1.5)/6= (10+5)/6

= 15/6(:3)/(:3)

= 5/2