Question

Q21. Subtraction is associative for rational numbers. True or False *
( a ) True
( b ) False​

Answer 1

Answer:

false

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Answer 2

Answer:

In one word, False. If you want an explanation along with an example, refer below.  

Step-by-step explanation:

So, Subtraction is NOT associative for rational numbers.

Associativity means that the answer of 2 numbers is the same no matter how they are grouped.

Let's take an example:

(4/10 - 2/10) = (2/10 - 4/10)

          2/10  ≠  -2/10

As you can see, the numbers are the same, but the number on the left is positive, and the number on the right is negative.

Hence proved.

Hope it helps you!