Question

Ajutor pe 1 și 2 am nevoie foarte repede de rezolvare dacă se poate

Answer 1

a)7/11+2/11=9/11

b) 5/8+1/8+2/8=8/8=1

c) -15/4+3/4=(-15+3)/4=-12/4= - 3

d) 103/205+(-71/205)+3/205=(103-71+3)/205=35/205=7/41

e)(-8/23)+(-9/23)=(-8-9)/23= - 17/23

f)1/2+1/3+1/5=(15+10+6)/30=31/30=1 intreg si 1/30

g)2/7+(-1/9)=(2×9-1×7)/63=11/63

h) -10/7+11/7-8/7=(-10+11-8)/7=8/7

2.
a)(-2/5+(-3/10+1/2+4/15) numitor comun 30
[-2×6+(-3×3)+15×1+2×4]/30=(-21+23)/30=2/30=1/15

b)
-5/3+(-5/6)+5/2+(-5/12)=
(-5)×4+(-5)×2+5×6+(-5)/12= - 5/12

Answer 2

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