SChand New Learning Composite Mathematics Class 7 Chapter 1 Integers Exercise 1A

 Exercise 1A

Question 1

Write each number as an integer in the following situations.

(a) Profit of ₹ 17,000 in the first year and a loss of ₹ 5,000 in the second year.

Sol :

Profit=+17000

Loss=-5000


(b) Withdrawal of ₹ 800 from the bank

Sol :

=-800


(c) 5 degrees above zero degree

Sol :

=+5


(d) 2000 m above sea level

Sol :

=+2000


(e) 500 m  below sea level

Sol :

=-500 m


(f) Increase in weight by 5 kg

Sol :

=+5 kg


(g) Decrease in weight by 2 kg

Sol :

= -2 kg


Question 2

Graph each integer and its opposite on a number line

(a) 7

Sol :

Opposite=-7




(b) -5

Sol :

Opposite=+5




(c) -1

Sol :

Opposite=+1




(d) 4

Sol :

Opposite=-4




(e) -8

Sol :

Opposite=+8




Question 3

Compare the integers. Use > or < .

(a) -10 __ -15

(b) -29 __ -19

(c) -20 __ 20

(d) 7 __ -7

(e) -8700 __ -8000

Sol :


Question 4

Use a number line to order the integers from the least to the greatest.

(a) -4 , 3 , -6 , -7 , 6

Sol :


(b) -8 , -10 , -3 , 0 , -6

Sol :


Question 5

Write the absolute value of each

(a) |-27|

Sol :

27

(b) |18|

Sol :

18

(c) |-509|

Sol :

509

(d) |306|

Sol :

306


Question 6

Compare , write > or < or =

(a) 35 __ |35|

(b) -19 __ |-27|

(c) -|-5| __ |5|

(d) |-200| __ -300

(e) |-25| __ 25

(f) -|-39| __ -35

Sol :


Question 7

Write the opposite of 

(a) |45|

(b) |50|

(c) -|-25|

(d) -|18|

Sol :


Question 8

The table shows the average temperate in Vostok, Antarctica, from March to October . List the months in order from coldest to warmest.

MonthMarchAprilMayJuneJulyAugustSeptemberOctober
Temperature <0°f -72-84-86-85-88-90-87-71


Question 9

Use number line to find each sum 

(a) 6+2

(b) -4+(-3)

(c) 8+(-10)

(d) -4+7


Question 10

Find each sum

(a) -15+(-7)

(b) 13+27

(c) -44+4

(d) 36+(-60)

(e) -94+(-6)

(f) 39+(-9)

(g) 50-|-50|


Question 11

Find each sum

(a) -18+29+(-11)

(b) |-25|+9-|-4|


Question 12

(a) 8-15

(b) -7-(-12)

(c) 3-(-7)

(d) 8-(-15)

(e) -8-12

(f) 9-(-9)

(g) 89-(-11)

(h) -129-(-130)


Question 13

If the deepest point in the sea is 11600 m below sea level and the highest mountain top is 8846 m above sea level, then the difference in their elevation is 

(a) 2754 m

(b) 20446 m

(c) 21406 m

(d) 2952 m

Sol :


Question 14

The sum of two integers is 50. If one of them is -38, the other is 

(a) 88

(b) 12

(c) -88

(d) -12


Question 15

If p and q are two integers such that p is the predecessor of q, then p - q is equal to 

(a) 1

(b) 0

(c) 2

(d) -1

Sol :



Question 16

Which sum is not negative?

(a) -40+(-30)

(b) -70+65

(c) -63+82

(d) -49+0

Sol :








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