Question

Reduce a común denominador y calcula el resultado.
a)16/15+7/30
b)7/8+7/5
c)3/12-1/3
d) 4/30-9/42

Answer 1

Hola!!
A) 16/15 + 7/30
32/30+7/30
=39/30 ----simplificado---> 13/10

B)7/8 + 7/5
35/40+56/40
=91/40

C)3/12 - 1/3
3/12 - 4/12
=-1/12

D)4/30 - 9/42
168-270/1260
=-102/1260----> -51/630

Answer 2

a)16/15+7/30
32+7/30=39/30=13/10

b)7/8+7/5
35+56/40=91/40

c)3/12-1/3
3-4/12=1/12

d) 4/30-9/42
28-36/210=8/210=4/105