7. The value of `1/(1.2.3.4)+1/(2.3.4.5)+.......+1/(9.10.11.12)` is

Find the value of 1/(4(2/7)) + 1/(3(11/13)) + 1/(5/9)

The value of (2)/(5) div (3)/(10) of (4)/(9) - (4)/(5) xx 1 (1)/(9) div (8)/(15) - (3)/(4) + (3)/(4) div (1)/(2) is: (a)7/9 (b)23/6 (c)4/3 (d)25/12

(5 1/4-3 1/3)= (12)/(23) (b) 2 1(11)/(12) (d) (11)/(12)

The value of (5 1/2 div 3 2/3 of 1/4+(5 1/9-7 7/8 div 9 9/20)xx9/11)/(5 div 5 of 1/10-10xx 10 div 20) is:- (5 1/2 div 3 2/3 of 1/4+(5 1/9-7 7/8 div 9 9/20)xx9/11)/(5 div 5 of 1/10-10xx 10 div 20) का मान है :

The value of (3 2/3 div 11/30 of 2/3-1/4 of 2 1/2 div 3/5xx4 4/5)/(2/5 of 7 1/2 div 3/4-3/4xx1 1/2 div 2 1/4) is:- (3 2/3 div 11/30 of 2/3-1/4 of 2 1/2 div 3/5xx4 4/5)/(2/5 of 7 1/2 div 3/4-3/4xx1 1/2 div 2 1/4) का मान है :