Question

1. Write down a pair of integers whose.
(a) Sum is-7 = ....
2. Find the sum of -5 and -7 =
(b) Difference is 10 =​

Answer 1

Write down a pair of integers whose:-

(a) Sum is -7

• -5 -2 = -7
• -4 - 3 = -7

(b) Find the sum of -5 and -7

• -5 + (-7)
• -5 - 7
• -12

(c) Difference is 10

• - 20 + 10 = -10
• 30 - 40 = -10

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Facts to remember:-

• The numbers ... -5, -4, -3, -2, -1, -0, 1, 2, 3, 4, 5 are integers.
• The set of numbers from 1, 2, 3, 4, 5, ... are natural numbers.
• The set of numbers from 0, 1, 2, 3, 4, 5 ... are whole numbers.
• '0' is an integer which is neither positive, nor negative.
• The absolute value of an integer is its numerical value regardless of its sign.
• '0' is less than every positive integer and more than every negative integer.

Signs:-

Sign Sign Work Sign

+ - - greater number

+ + + +

- - + -

Answer 2

$\huge\boxed{\fcolorbox{black}{pink}{Question}}$

• 1. Write down a pair of integers whose.
• (a) Sum is-7 =
• 2. Find the sum of -5 and -7 =
• (b) Difference is 10 =

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$\huge\boxed{\fcolorbox{black}{pink}{Your\:αηsωєя}}$

1) write down a a pair of integers whose sum is -7

Ans:- $\small\fbox{-5\:and\:-2}$

-5+(-2)

-5-2

= - 7

2) Find the sum of -5 and-7

Ans:- $\small\fbox{-5+(-7)}$

=-5-7

=-12

3)write a a pair of integers whose difference is 10

Ans:- $\small\fbox{20\:and\: 10}$

20-(+10)

20-10

=10

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