ML Aggarwal CBSE Solutions Class 7 Math First Chapter Integers Exercise 1.1

ML Aggarwal CBSE Solutions Class 7 Math 1st Chapter Integers Exercise 1.1

Ex – 1

(1) Some integers are marked on the following number line:

(i) Write these integers in ascending order.

(ii) Write these integers in descending order.

(iii) Few dots have been marked on the above number line. Write appropriate integer at each dot.

(2) A number line representing integers is given below:

The integers -3 and -2 are marked by points E and F respectively. Which integers are marked by the points B, D, H, J, M and O?

(3) Arrange 7, -5, 4, 0 and -4 in ascending order and mark them on a number line to check your answer.

(4) In a quiz, positive marks are given for correct answers and negative marks are given for incorrect answers. If Rohit’s scores in five successive rounds were 15, -3, -7, 12, and 8, what was his total at the end?

(5) Ruchi deposited Rs. 4370 in her account on Monday and then withdrew Rs. 2875 on Tuesday. Next day she deposited Rs. 1550. What was her balance on Thursday?

(6) Ravi goes 28 km towards east from a point P to the Q, he moves 37 km towards west along the same road, If the distance towards east is represented by a positive integer then, how will you represent the distance traveled towards west? By which integer will you represent his final position from P?

(7) Fill in the blank spaces by integers of the adjoining magic square so that the sum of the integers in each row, each column and each diagonal is -6.

-1

   
3

-2

 
     

(8) Evaluate the following

(i) |-13| – |9|

(ii) |13 – 5| – |-9|

(iii) |35 – 21| – |8 – 3|

(9) Arrange the following integers in ascending order:

-39, 35, -102,0,-51, -5, -6, 7

(10) Arrange the following integers in descending order:

-31, 139, -203, -97, 0, 4208

(11) State whether each of the statement is true or false:

(i) 0 is the successor of -1 in integers

(ii) 0 has no predecessor in integers

(iii) -2 is the predecessor of -1

(iv) 0 is greater than every negative integer.

(12) Use the sign >, < or = in the box to make the following statements true:

(i) (-11) + (-7) ____ (-11) – (-7)

(ii) 23 Р41 + 41  ____ 23 -41 Р11

(iii) 40 – (-39) + (-5) _____ 40 + (-39) – (-5)

(iv) (-3) + 13 – (15) ____ 25 – (-2) + (-33)

Solution

____ x ____

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