Addition of Integers

Q.

Write a negative integer and a positive integer whose sum is$-5$.

Q.

A merchant had Rs 78, 592 with her. She placed an order for purchasing 40 radio sets at Rs 1200 each. How much money will remain with her after the purchase?

Q.

Write down a pair of integers whose difference is $-10$.

Q.

How many 7- digit number are there? a) 8999999

b)9000000

c) 1000000

d)none of these

Q.

Question 185

Determine the sum of the four numbers as given below.

(a) Successor of 32

(b) Predecessor of 49

(c) Predecessor of the predecessor of 56

(d) Successor of successor of 67

Q.

Cost of 4 dozens bananas is Rs 180. How many bananas can be purchased for Rs 90?

Q.

What is the journal entry for sold old furniture for Rs 50000?

Q.

The difference of two negative integers is always negative.

1. True
2. False

Q. A submarine was floating at a depth of 420 metres below the see level. If it ascends 210 metres , what will be the new position? Express the position in terms of height.

Q.

A diver descends $20$ feet underwater from a boat on the surface of the lake. He then rose $12$ feet and descends another $18$ feet. Find his final position.

1. $13$ feet below the surface of the lake.
2. $17$ feet below the surface of the lake.
3. $21$ feet below the surface of the lake.
4. $26$ feet below the surface of the lake.

Q.

Question 3 (b)

Add without using number line:
(–13) + (+18)

Q. The point A is on a mountain which is 5700 meters above sea level and the point B is a mine which is 39600 meters below sea level . Find the vertical distance between A and B

Q.

A student multiplied 8355 by 89 instead of multiplying by 98. By how much was his answer less than the actual answer?

Q.

The sum of two negative integers is a positive integer.

1. True

2. False

Q.

Question 4 (c)

Find the sum of:
–312, 39 and 192

Q.

$20$, $20$, $19$, $16$, $17$, $13$, $14$, $11$, $?$, $?$.

1. a) $15$, $18$

2. b) $10$, $10$

3. c) $12$, $14$

4. d) $13$, $16$

Q. If a, b, c are positive integers such that abc+ab+ac+bc+a+b+c=1000 then a+b+c=?

Q. 2+2/4

Q.

Question 69

Write two integers whose sum is less than both the integers.

Q.

Three candidates contested on election for a particular seat. They each received $25527,33572\mathrm{and}3750$ votes respectively. If $1250$ votes were declared invalid, then find the total number of votes polled.

Q.

Write the following in expanded form.

(a) 74836 (b) 574021 (c) 8907010

Q.

Question 182

A garment factory produced 216315 shirts, 182736 trousers and 58704 jackets in a year. What is the total production of all the three items in that year?

Q.

What is full form of MSL?

Q.

True or false:

The sum of three integers can never be zero

Q.

Question 64

Write the digits 0, 1, 2, 3, ......., 9 in this order and insert '+' or '-' between them to get the result 3.

Q.

Question 3 (c)

Add without using number line:
(–10) + (+19)

Q.

How many whole numbers are there in between $12$ and $86$ ?

Q.

Write the predecessor and successor of the following integers.

$0$

Q.

Number of whole numbers between $48$ and$78$.

1. $31$

2. $30$

3. $29$

4. $28$

Q.

Question 38.

State True/False

The sum of two negative integers is a positive integer.