Question 1
What is the value of $(-22)-[(-23)-{(-17)-(-61)}]$
Answers
45
Question 2
What should be subtracted from -9876 to obtain -9512?
Answers
-364
Question 3
The temperature of a city is 4
^{0}C. Next day the temperature falls by 5
^{0}C. What is the temperature of the city next day?
Answers
-1^{0}C
Question 4 Fill in the blanks
- Sum of integer and its additive inverse is ____________
- Sum of -22 and -44 is ______________
- -36 ÷ (_______)=-9
- _________ is absolute value of -998
Answers
i. zero
ii.-66
iii.4
iv. 998
Question 5
Mark the correct option
- Sum of two negative numbers is always
- Positive
- Negative
- 0
- 1
- Which property is reflected in this equation 7×5=5×7
- Closure
- Commutative
- Associative
- Distributive
Answers
i. b
ii. b
Question 6
A divers descends 20 feet in the water from the boat at the surface of a lake. He then rose 12 feet and descends another 18 feet. At this point what is his depth in water?
Answers
26 feet
Question 7 Verify a-(-b) =a + b for the following values of ‘a’ and ‘b’
- a=34 b=73
- a=45 b=30
Question 8 Write down the pair of integers whose
- Sum is -4
- Sum is 0
- Difference is 2
- Difference is -6
Question 9 Verify the following
- (-22) × [(-4) + (-5)]=[(-22) × (-4)] + [(-22) × (-5)]
- (-12) × [(3) + (-9)]=[(-12) × (4)] + [(-12) × (-9)]
Question 10 Evaluate
- (-100)÷5
- (-36)÷(-4)
- (0)÷(-12)
- [(-30)÷5]÷2
- (-40)÷40
Answers
a. -20
b. 9
c. 0
d. -3
e. -1
Question 11 The price of the stock decreases Rs. 45 per day for four consecutive days. What was the total change in value of the stock over 4 day period?
Answers
-180
Question 12 A group of hikers is descending the mountain at a rate of 600 feet per hour. What is the change in elevation of hiker after 6 hours?
Answers
-3600 feet than the initial position
Question 13 An elevator descends into a mine shaft at the rate of 6 m/min. If the descent starts from 10 m above the ground level, how long will it take to reach -350 m.
Answers
Total height to be descended =10 - (-350) =360 m
Time taken = 360/6= 60 min
Question 14 In a test (+5) marks are given for every correct answer and (-2) marks are given for every incorrect answer.
- Radhika answered all the questions and scored 30 marks and get 10 correct answers
- Jay also answered all the questions and scored (-12) marks though he got 4 correct answers
How many incorrect answers had they attempted?
Answers
i. Radhika got 10 correct answer,So Marks obtained from them = 10 *5 = 50 Mark
But he got 30 total marks ,so 50-30 = 20 marks ,she got for negative marking
So,incorrect question attempted = 20/2=10
ii. Jay got 4 correct answer,So Marks obtained from them = 4 *5 = 20 Mark
But he got -12 total marks ,so 10-(-12) = 32 marks ,she got for negative marking
So,incorrect question attempted = 32/2=16
Question 15 In a test (+5) marks are given for every correct answer and (-2) marks are given for every incorrect answer and 0 for answer not attempted. Ram gets 3 correct and 4 incorrect out of 7 questions he attempted. What is his score?
Answers
Ram score = 3 * 5 + 4 * (-2) = 7
Download this assignment as pdf
link to this page by copying the following text
Also Read
Class 7 Maths
Class 7 Science