Daily Practice Problems

Class 7 Maths

Integers

Class 7 Maths

Integers

** Question 1:**

** **Choose the correct answer:

1. The sum of two integers is -6. If one of them is 2, then the other is

(a) -4

(b) 4

(c) 8

(d) -8

2. What should be subtracted from -7 to obtain -15

(a) -8

(b) 8

(c) -22

(d) 22

3. (?) ÷ (-18) = - 6

(a) -108

(b) 108

(c) 3

(d) None of these

4. ( - 37) X ( - 7) + ( - 37) X ( - 3) = ?

(a) 370

(b) -370

(c) 148

(d) -148

5. (-9) – (-6) =?

(a) -15

(b) -3

(c) 3

(d) 15

**Question 2:**

Find the value of:

(i) 1487 × 327 + (-487) × 327

(ii) 28945 × 99 – (-28945)

**Question 3:**

A shopkeeper gains Rs 1 on each pen and loses 40 paise on each pencil. He sells 45 pens and some pencil losing Rs 5 in all. How many pencils does he sell?

**Question 4: **

Solve the following:

(a) (-40) × (-1) + (-28) ÷ 7

(b) (-3) + (-8) ÷ (-4) -2 × (-2)

**Question 5:**

Subtract -134 from the sum of 38 and -87

**Question 6:**

A certain freezing process requires that room temperature we lowered from 40^{0}C at the rate of 5^{0}C per hour. What will be the room temperature 12 hours after the process begins?

**Question 7:**

In a class test containing 20 questions, 4 marks are given for every correct answer and (-2) marks are given for every incorrect answer. Ranjita attempts all questions and 12 of her answers are correct. What is her total score?

**Question 8:**

Add the product of (-16) and (-9) to the quotient of (-132) by 6.

**Question 9:**

Divide:

(i) (-115) by 23

(ii) (-324) by (- 27)

**Question 10:**

What should be divided by (- 7) to obtain 12?

**Question 11:**

What will be the sign of the product if we multiply together 199 negative and 10 positive integers?

**Question 12:**

Find each of the following products:

(i) 35 X (-18)

(ii) (-42) X 20

**Question 13:**

Simplify:

(i) 8 X (-15) + 8 X 6

(ii) 15 X (-32) + 15 X (-18)

**Question 14:**

Find 36 – (-64) and (-64 )- 36 . Are they equal?

**Question 15:**

If a = -9 and b = -6, show that (a – b) *≠ * (b – a)

**Question 16:**

In a class test containing 10 questions, 5 marks are awarded for correct answer and (-2) marks are awarded for every incorrect answer and 0 for each question not attempted. Ravi gets 4 correct and 6 incorrect answers. What is his score?

**Question 17:**

Fill in the blanks:

(i) (- 6) X (___) = 6

(ii) (-18) X (___) = -18

(iii) (-8) X (-9) = (- 9) X (___)

**Question 18:**

For each of the following statements, write (T) for True and (F) for false:

(i) The smallest integer is zero

(ii) -10 is greater than -7

(iii) Zero is larger than every negative integer.

**Question 19:**

Subtract -134 from the sum of 38 and -87.

**Question 20:**

Find each of the following products:

(i) (-4) X (- 5) X (-8) x (-10)

(ii) 7 x (-8) X 3

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