Question

Ajudem aí é para hoje!!!​

Answer 1

Resposta:

Explicação passo-a-passo:

A)

= 1/3+5/12

= (4.1+1.5)/12

= (4+5)/12

= 9/12 (:3)/(:3)

= 3/4

___________

B)

= 1/2+3/4

= (2.1+1.3)/4

= 5/4

__________

C)

= 2/5+1/15

= (3.2+1.1)/15

= (6+1)/15

= 7/15

_________

D)

= 1/5-2/3

= (3.1-5.2)/15

= (3-10)/15

= -7/15

_______

E)

= 1/2-3/4

= (2.1-1.3)/4

= (2-3)/4

= -1/4

________

F)

= 1 1/4+1/2

= (4.1+1)/4 + 1/2

= 5/4+1/2

= (5+2)/2

= 7/2

________

G)

= 3/4.2/6 (:2)/(:2) . 2/5 . 2/7.7

= 3/4 . 1/3 . 2/5 . 7/7 . 2

= 3/3 . 1/4 . 2/5 . 2 . 1

= 1 . 1/4 . 4/5

= 1 . 4/4 . 1/5

= 1/5

_________

H)

= (5/8.3/5)+1/2

= (5/5.3/8)+1/2

= 3/8+1/2

= (1.3+4.1)/8

= (3+4)/8

= 7/8