Question

realiza las siguientes sumas a.2/5+2/5 b.1/7+3/7+2/7 c.4/9+-3/9+1/9 d.5/10+3/10+-4/10 e.3/4+-5/3 f.-5/7+2/3 g.-3/5+2/7 h.9/8+-7/10 i.-3/4+1/6 j.5/6+-7/12 k.-1/6+1/4 l.-3/8+7/4 m.7/8+-1/8 n.-38/12+-4/12

Answer 1

Respuesta:

a 4/5 b6/7 c 2/9 d 4/10 e -11/12 f -1/21 g -11/35 h 34/80 i -14/24 j3/12 k 2/24 l 11/4 m6/8 n-42/12

Answer 2

Respuesta:

a. 2/5+2/5 = 4/5

b. 1/7+3/7+2/7 = 6/7

c. 4/9+-3/9+1/9 = 2/9

d. 5/10+3/10+-4/10 = 4/10 = 2/5

e. 3/4+-5/3 = (9-20)/12 = -18/12 = -3/2

f.-5/7+2/3 = (-15+14)/21 = -1/21

g.-3/5+2/7 = (-21+10)/35 = -11/35

h.9/8+-7/10 = (90-56)/80 = 34/80 = 17/42

i.-3/4+1/6 = (-18+4)/24 = -14/24 = -7/12

j.5/6+-7/12 = (60-42)/72 = 18/72 = 1/4

k.-1/6+1/4 = (4+6)/24 = 10/24 = 5/12

l.-3/8+7/4 = (-12+56)/32 = 44/32 = 11/8

m.7/8+-1/8 = 6/8 = 3/4

n.-38/12+-4/12 = -42/12 = -7/2