Question

3. Calculati: a)2/7+(-4/21)
b)(-7/5)+(-2/15)
c)(+1/6)+(-3/4)
d) (-5/12+(-3/4)
e)(-17/18)+(-2/6)
f)(-1/6)+(+21/24)
g)(-3/10)+(+7/6)
h)2/15+(-7/18)
i)2/3+5/27
VA ROOOG!!!!!!

Answer 1

Răspuns:

a) 2/7+(-4/21)=3×2+(-4)×1/21=2/21

b) (-7/5)+(-2/15)=3×(-7)+1×(-2)/15=-23/15

c) 1/6+(-3/4)=4×1+5×(-3)/24=-14/24sau-7/12

d) (-5/12)+(-3/4)=1×(-5)+3×(-3)/12= =-14/12sau-7/6

e) (-17/18)+(-2/6)=1×(-17)+3×(-2)/18=-23/18

f) (-1/6)+21/24=4×(-1)+1×21=17/24

g)(-3/10)+7/6=5×2+3×7/2=6/2sau3

h)2/15+(-7/18)=5×2+6×(-7)/3=-32/3

i)2/3+5/27=9×2+1×5/27=23/27

sper că te-am ajutat