# Ex.1.2 Q2 Integers - NCERT Maths Class 7

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a) Write the pair of negative integers whose difference gives $$8.$$

b) Write a negative integer and a positive integer whose sum is $$–5.$$

c) Write a negative integer and a positive integer whose difference is $$–3.$$

What is known?

The two integers whose sum and difference is given.

What is unknown?

Sum and difference of a pair of integers.

Reasoning:

Add or subtract the two values.

Steps:

a) Let us have $$-2$$ and $$-10$$

\begin{align}\therefore{\rm{Difference}}& = (-2)\,-(-10) \\&=- 2 + 10\\&= 8\end{align}

b) Let us have $$-10$$ and $$5$$

\begin{align}\therefore\rm{Sum} &= -10\,+\,5 \\&=\,-5\end{align}

c) Let us have $$-2$$ and $$1$$

\begin{align}\therefore\rm{Difference} &= -2\,-\,1\\&=\,-3\end{align}

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