Question

simplyfy the following using appropriate properties of the rational number (4/9×2 1/4)×5/4)​

Answer 1

Answer:

3/7+4/9+(−5/21)+2/3

=3/7+(−5/21)+4/9+2/3

On simplifying, we get,

={9+(−5)}/21+(4+6)/9

=4/21+10/9

Taking L.C.M. we get,

=(12+70)/63

=82/63

Answer 2

Answer:

= (4/9 * 9/4) * 5/4.(2¼=9/4)

= (1) * 5/4

= 5/4.

Multiplicative identity.

I think this identity is used in forming this steps.