Question

Efetue as adições
A) (+2/5) + (-1/3)
B) (-2/3)+ (-5/6)
C) (+3/5) + (-1/3) + (-2/5)
D) (+0,1) + (-1,1) + (+0,11)
Pfv gente preciso das contas e dos cálculos de MMC

Answer 1

a)
2/5 + (-1/3)
= 2/5 - 1/3
MMC de 3 e 5 = 3x5 = 15
= 3(2) - 5(1)/15
= 6 - 5/15
= 1/15

b)
-2/3 + (-5/3)
= -2/3 - 5/3
= -2-5/3
= -7/3

c)
3/5 + (-1/3)+ (-2/5)
= 3/5 - 1/3 -2/5
MMC de 5,3,5 = 3x5 = 15
= 3(3) - 5(1) -3(2)/15
= 9-5-6/15
= -2/15

d)
0,1 + (-1,1) + (0,11)
= 0,1 -1,1 + 0,11
= -0,89
ou
= 10/100 -11/10 + 11/100
MMC = 100
= 10(1) -10(11) + 11(1)/100
= 10 - 110 + 11/100
= -89/100

Answer 2

Resposta:a)

2/5 + (-1/3)

= 2/5 - 1/3

MMC de 3 e 5 = 3x5 = 15

= 3(2) - 5(1)/15

= 6 - 5/15

= 1/15

b)

-2/3 + (-5/3)

= -2/3 - 5/3

= -2-5/3

= -7/3

c)

3/5 + (-1/3)+ (-2/5)

= 3/5 - 1/3 -2/5

MMC de 5,3,5 = 3x5 = 15

= 3(3) - 5(1) -3(2)/15

= 9-5-6/15

= -2/15

d)

= 10/100 -11/10 + 11/100

MMC = 100

= 10(1) -10(11) + 11(1)/100

= 10 - 110 + 11/100

= -89/100