Punjab State Board PSEB 7th Class Maths Book Solutions Chapter 1 Integers Ex 1.1 Textbook Exercise Questions and Answers.

## PSEB Solutions for Class 7 Maths Chapter 1 Integers Ex 1.1

1. Use the appropriate symbol >, <, = to fill in the blanks

Answer:

(i) -3 > -5

(ii) – 2 < 5-4

(iii) 8-4 > – 3

(iv) – 6 < 5-0

(v) 5 = 8-3

(vi) 0 > – 3.

2. Arrange the following integers in ascending order.

Question (i)

– 2, 12, – 43, 31, 7, – 35, – 10

Answer:

Given positive integers are 12, 31, 7

Ascending order is 7 < 12 < 31

Given negative integers are – 2, – 43, – 35, -10

Ascending order is – 43 < – 35 < – 10 < -2.

Hence, all given integers in ascending order are :

– 43 < – 35 < -10 < – 2 < 7 < 12 < 31.

i.e. – 43, – 35, – 10, – 2, 7, 12, 31.

Question (ii)

– 20, 13, 4, 0, – 5, 5

Answer:

Given positive integers are 13, 4, 5

Ascending order is 4 < 5 < 13

Given negative integers are – 20, – 5

Ascending order is -20 < – 5.

Hence all given integers in ascending order are :

– 20 < – 5 < 0 < 4 < 5 < 13

i.e. – 20, – 5, 0, 4, 5, 13

3. Arrange the following integers in descending order.

Question (i)

0, – 7, 19, – 23, – 3, 8, 46

Answer:

Given positive integers are 19, 8, 46

Descending order is 46 > 19 > 8

Given negative integers are – 7, – 23, – 3

Descending order is – 3 > – 1 > – 23

Hence, all given integers in descending order are :

46 > 19 > 8 > 0 > – 3 > – 7 > – 23

i.e. 46, 19, 8, 0, – 3, – 7, – 23

Question (ii)

30, – 2, 0, – 6, – 20, 8.

Answer:

Given positive integers are 30, 8

Descending order is 30 > 8

Given negative integers are – 2, – 6, – 20

Descending order is-2 > -6 > -20

Hence all given integers in descending order are :

30 > 8 > 0 > -2 > – 6 > – 20

i.e. 30, 8, 0, – 2, – 6, – 20

4. Evaluate :

Question (i)

30 – | -21 |

Answer:

30 – | -21 | = 30 – 21

[∵ | – 21 | = 21]

= 9

Question (ii)

| -25 | – | -18 |

Answer:

| -25 | – | – 18 | = 25 – 18

[∵ | -25 | = 25 and | – 18 | = 18]

= 7

Question (iii)

6 – | -4 |

Answer:

6 – | -4 | = 6 – 4

[∵ | – 4 | = 4]

= 2

Question (iv)

| – 125 | + | 110 |

Answer:

| – 125 | + | 110 | = 125 + 110

[∵ | -125 | = 125 and | 110 | = 110]

= 235

5. Fill in the blanks :

Question (i)

0 is greater than every …………… integer.

Answer:

Negative

Question (ii)

Modulus of a negative integer is always ……………

Answer:

Positive

Question (iii)

The smallest positive integer is ……………

Answer:

1

Question (iv)

The largest negative integer is ……………

Answer:

-1

Question (v)

Every negative integer is less than every …………… integer.

Answer:

Positive