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# Ex.1.1 Q9 Integers - NCERT Maths Class 7

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## Question

Use the sign of $$<, >$$ or $$=$$ to make the statement true?

\begin{align} {\rm a.}\, –8+(–4) \;&\boxed{\;\;}\; –8–(–4)\quad \\-8-4\quad&\boxed{\;\;} \quad -8+4\quad\\–12 \quad&\boxed{\lt} \quad –4 \end{align}

\begin{align}&A\left( {3,2} \right), \qquad\;\;\;\;\;\;\;\;\;\;\;\;B\left( { - 2,3} \right), \qquad\;\;\;\;\;\; C\left( {0,4} \right)\\&D\left( { - \frac{1}{2}, - \frac{3}{2}} \right), \qquad E\left( {\sqrt 2 , - \sqrt 2 } \right), \qquad F\left( {\pi ,0} \right) & \end{align}

 a.$$(-8) + (–4)$$ $$\quad\boxed{\;\;}$$ $$(–8) – (–4)$$ b. $$(–3)+7–(19)$$ $$\quad\boxed{\;\;}$$ $$15–8+(–9)$$ c. $$23–41+11$$ $$\quad\boxed{\;\;}$$ $$23–41–11$$ d. $$39 + (–24) –(15)$$ $$\quad\boxed{\;\;}$$ $$36+ (– 52) – (–36)$$ e. $$–231+79+51$$ $$\quad\boxed{\;\;}$$ $$–399+159+81$$

Video Solution
Integers
Ex 1.1 | Question 9

## Text Solution

What is known?

The statement.

What is unknown?

To find out which is greater than, smaller than or equal to.

Reasoning:

Add or Subtract the two values and after check the statement is <,>,or =

Steps:

\begin{align} {\rm a.}\, –8+(–4) \;&\boxed{\;\;}\; –8–(–4)\quad \\-8-4\quad&\boxed{\;\;} \quad -8+4\quad\\–12 \quad&\boxed{\lt} \quad –4 \end{align}

\begin{align}{\rm b.}\; –3+7–19\;&\boxed{\;\;}\; 15 –8 + (–9)\\–3+7–19\quad&\boxed{\;\;} \quad 15 –8 –9 \\4–19 \quad&\boxed{\;\;} \quad 7–9\\ –15 \quad&\boxed{\lt} \quad –2\\ \end{align}

\begin{align}{\rm c.}\;23–41+11 \;&\boxed{\;\;}\; 23 –41 –11 \\ –18+11\quad&\boxed{\;\;} \quad –18 –11 \\ -7\quad&\boxed{\gt} \quad -29 \\ \end{align}

\begin{align}{\rm d.}\; 39+(–24)–15 \;&\boxed{\;\;}\; 36 + (–52) – (–36) \\39–24–15\quad&\boxed{\;\;} \quad 36–52+36 \\ 15-15\quad&\boxed{\;\;} \quad -16 + 36\\0\quad&\boxed{\lt} \quad 20 \\ \end{align}

\begin{align} {\rm e.}\; –23 + 79 + 51 \;&\boxed{\;\;}\; –399 + 159 + 81\quad \\ –152 + 51\quad&\boxed{\;\;} \quad –240+81\quad\\–101 \quad&\boxed{\gt} \quad –159 \end{align}

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