Vaishali Bhatia and Rupesh Pathak Solutions for Chapter: Integers, Exercise 2: Mental Maths

Write True or False.

Addition is associative for integers.

Write True or False.

Additive identity of an integer $\mathrm{a}$ is $-\mathrm{a}$.

Write True or False.

On adding any integer with its additive inverse, we get the additive identity.

Write True or False.

Integers are not closed under subtraction.

Write True or False.

Additive identity of an integer $\mathrm{a}$ is $0$.

Write True or False.

Sum of two negative integers is a positive integer.

Write True or False.

$(\mathrm{a}-\mathrm{b})-\mathrm{c}=\mathrm{a}-(\mathrm{b}-\mathrm{c})$

Write True or False.

$\mathrm{a}+(-\mathrm{a})$ is always positive.