ML Aggarwal Integers Exe-1.4 Class 7 ICSE Maths Solutions
ML Aggarwal Integers Exe-1.4 Class 7 ICSE Maths Solutions. We Provide Step by Step Answer of Exe-1.4 Questions for Integers as council prescribe guideline for upcoming board exam. Visit official Website CISCE for detail information about ICSE Board Class-7.
ML Aggarwal Integers Exe-1.4 Class 7 ICSE Maths Solutions
| Board | ICSE |
| Publications | Avichal Publishig Company (APC) |
| Subject | Maths |
| Class | 7th |
| Chapter-1 | Integers |
| Writer | ML Aggarwal |
| Book Name | Understanding |
| Topics | Solution of Exe-1.4 Questions |
| Edition | 2023-2024 |
Integers Exe-1.4
ML Aggarwal Class 7 ICSE Maths Solutions
Page-21
Question 1. Evaluate the following:
(i) (-36) ÷ (-9)
(ii) 150 ÷ (-25)
(iii) (-270) ÷ 27
(iv) (-59) ÷ 59
(v) 0 ÷ (-17)
(vi) (-784) ÷ (-56)
Answer:
(i) (-36) ÷ (-9) = -36/-9
= +4
(ii) 150 ÷ (-25) = 150/-25
= -6
(iii) (-270) ÷ 27 = -270/27
= -10
(iv) (-59) ÷ 59 = -59/59
= -1
(v) 0 ÷ (-17) = 0/-17
= 0
(vi) (-784) ÷ (-56) = -784/-56
= 14
Question 2. Evaluate the following:
(i) 13 ÷ [(-2) + 1] (ii) (-47) ÷ [(-45) + (-2)] (iii) [(-6) + 5] ÷ [(-2) + 1] (iv) [(-48) ÷ (-6)] ÷ (-2)
Answer:
(i) 13 ÷ [ (-2) +1 ]
= 13 ÷ [ -2 +1 ]
= 13 ÷ (-1)
= -13
(ii) (-47) ÷ [ (-45) + (-2) ]
= (-47) ÷ (-47)
= 1
(iii) [ (-6) + 5 ] ÷ [ (-2) +1 ]
= [ -6 +1 ] + [ -2 +1 ]
= (-1) ÷ (-1)
= 1
(iv) [ (-48) ÷ (-6) ] ÷ (-2)
= 8 ÷ (-2)
= -4
Question 3. Verify that (a ÷ b) ÷ c ≠ a ÷ (b ÷ c) for a = -225, b = 15 and c = -3.
Answer:
Question 4. Verify that a ÷ (b ÷ c) ≠ (a ÷ b) ÷ (a ÷ c) for
(i) a = -10, b = 1 and c = 1
(ii) a = 12, b = 1 and c = -2
Answer:
a ÷ (b ÷ c) ≠ (a ÷ b) ÷ (a ÷ c)
= (12/1) + (12/-2)
= 12 – 6
= 6
Question 5. Fill in the blanks to make the following statements true:
(i) 239 ÷ …….. = 1
(ii) (-85) ÷ …….. = -1
(iii) (-213) ÷ ….. = 1
(iv) (-43) ÷ …… = 43
(v) …….. ÷ (-21) = 4
(vi) (-66) ÷ ……. = -3
Answer:
(i) 239 ÷ …….. = 1
239 ÷ 239 = 1
(ii) (-85) ÷ …….. = -1
(-85) ÷ (85) = -1
(iii) (-213) ÷ ….. = 1
(-213) ÷ -213 = 1
(iv) (-43) ÷ …… = 43
(-43) ÷ -1 = 43
(v) …….. ÷ (-21) = 4
-21 × 4 = -84
(-84 ) ÷ (-21) = 4
(vi) (-66) ÷ ……. = -3
(-66) ÷ 22 = -3,
Question 6. In competition 3 marks are given for every correct answer and (-2) marks are given for every incorrect answer and no marks for not attempting any question.
(i) Sachin scored 24 marks. If he got 14 correct answers, how many questions has he attempted incorrectly?
(ii) Nalini scores (-7) marks in this competition, though she has got 9 correct answers. How many questions she has attempted
incorrectly?
Answer:
In a competition,
3 marks for every correct answer and (-2) marks for every incorrect answer.
No marks for non – attempting the question.
Sachin got 14 correct answers, and got 24 marks he attempted 14 correct answer
He would have got 14 × 3 = 42 marks
But to get 24 marks 42 -24 = 18 marks were deducted due to incorrect answer.
He attempted 18/2
= 9 question incorrect.
(ii) nalini scored (-7) marks, she got 9 correct answers, so she would have 9 × 3 = 27
But she got (-7) marks
So , 27 + 7 = 34 marks were deducted due to incorrect answers.
Number of incorrect answers = 34/2
= 17 question
Question 7. An elevator descends into a mine shaft at the rate of 6 m/min. If the descend starts from 10 m above the ground level, how long will it take to reach the shaft 350 m below the ground level?
Answer:
Rate of elevator = 6 m/min
And it was started 10m above the ground level
Depth below ground level = 350 m
Total depth = 350 + 10 = 360
Time taken = 360/6 minutes
= 60 minutes
= 1 hour
— : End of ML Aggarwal Integers Exe-1.4 Class 7 ICSE Maths Solutions :–
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