Question

Pls explain the answer to me

Answer 1

see.

you have to use the properties that u have learnt

commutative

distributive

closure ....

So here in the first part they are using commutative to simplify it

then after that they r using distributive to get the answer.

hope you have understood

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Answer 2

Step-by-step explanation:

2/5*3/7-1/14-3/7*3/5

Commutative property :

A+B=B+A (In Addition)

A*B=B*A(In multiplication).

Distributive property :

A(B+C) =AB+AC.

So by using this properties we can do the problem.

May be it will help you.

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