1 10 18 - 1 10 20 a 99 10 20 b 99 10 c 0 9 d none of

it is not given clearly... it must be understood that
(1/10)power 18 - (1/10)power 20
now by solving, we get 99/(10 power 20) which is option 1
10 years agoHelpfull: Yes(7) No(1)
(18/10)-2;
1.8-2=
-0.2
11 years agoHelpfull: Yes(3) No(1)
by taking (1/10) as a common term
(1/10)*(18-20)=-0.2.
ans.D
11 years agoHelpfull: Yes(2) No(1)
(d)none of these
11 years agoHelpfull: Yes(2) No(1)
(1/10 to power 18 - 1/10 to power 20 ) is actual question... taking 10 to power 20 as lcm solve it finally u get (100-1)/10^20 that is = 99/1020.. so option A is correct
10 years agoHelpfull: Yes(2) No(0)
d)none of these
11 years agoHelpfull: Yes(1) No(1)
9/5-2=1.8-2=-0.2
so ans is d
11 years agoHelpfull: Yes(1) No(1)
none of these
ans: -0.2
10 years agoHelpfull: Yes(0) No(0)
Ans:(d)
(18/10)-(20/10)=-0.2
10 years agoHelpfull: Yes(0) No(0)

(1/10) 18 - (1/10) 20 = ?
(a) 99/10 20 (b) 99/10 (c) 0.9 (d) none of these