how to solve these 3 questions
Answers
Answer:
(a) -7/12+13/15=13/15+(-7/12)
l.h.s= -7/12+13/15
l.c.m of 12and15 is 60
-35+52/60
17/60
r.h.s=13/15+(-7/12)
l.c.m of 15and12 is 60
52+-35/60
52-35/60
17/60
l.h.s = r.h.s
17/60 = 17/60
verify
(b) -5/8+(8/9+-11/12)=(-5/8+8/9)+(-11/12)
l.h.s = -5/8+(8/9+-11/12)
-5/8+(l.c.m of 9and12 is 36)
-5/8+(32+-33/36)
-5/8+(32-33/36)
-5/8+-1/36
l.c.m of 8and36 is 72
-45+-2/72
-45-2/72
47/72
r.h.s = (-5/8+8/9)+(-11/12)
( l.c.m of 8and9 is 72)+(-11/12)
(-45+64/72)+(-11/12)
(19/72)+(-11/12)
l.c.m of 72and12 is 72
19+-66/72
19-66/72
47/72
l.h.s = r.h.s
47/72=47/72
verify
(c) (-8/15+-13/20)×-5/6=(-8/15×-5/6)+(-13/20×-5/6)
l.h.s =(-8/15+-13/20)×-5/6
l.c.m of 15and20 is 60
(-32+-39/60)×-5/6
(-32-39/60)×-5/6
-71/60×-5/6
71/72
r.h.s = {(-8/15×-5/6)+(-13/20×-5/6)}
(4/9+13/24)
l.c.m of 9 and 24 is 72
(32+39/72)
71/72
l.h.s = r.h.s
71/72=71/72
verify
Answer:
i know 1st question
I hope it's right
