`-3/4xx4/5 + 5/2 -4/5xx2/7`

Evaluate [3/4xx((2/4)xx(4/5)+3/4-4/5)xx4/3]

Evaluate (i) 3/2 xx 4/5+3/5 xx 4/5 (ii) 14/3 xx 7/2-1/3 xx 7/2

(1/4 xx 2/7)- ( 5/(14) xx 2/3)

Perform the following multiplication a) 2/9 xx 7/8 xx 1/9 b) 1/3 xx 4/5 xx 1/4 c) 1/3 xx 2/4 xx 5/3 d) 1/2 xx 1/3 xx 1/4 e) 1/5 xx 2/5 xx 2/3 f) 2/3 xx 5/6 xx 1/4

Simplify and express each of the following as power of a rational number: (2/3)^3xx(-6/7)^2xx(-7/4)xx3/2 (iii) -(2/5)^2xx(5/7)^2xx(49)/5+(-4/5)^3xx5/4xx3/4

What is the value of (1xx 2 +2xx 3-3xx 4 +4xx 5 -5 xx 6 +6 xx 7) ?

LCM of ( 2^(3) xx 3 xx5) and ( 2^(4) xx 5xx 7) is

The number of zeros at the end of the product of : 2^3 xx 3^4 xx 4^5 xx 5^6 + 3^5 xx 5^7 xx 7^9 xx 8^10 + 4^5 xx 5^6 xx 6^7 xx 7^8 - 10^2 xx 15^3 xx 20^4 is :

(3/2 xx (-7)/4) - ((-5)/2 xx 3/4)

Show that -4/3xx(2/5+(-7/10))=(-4/3xx2/5)+(-4/3xx(-7/10))