ML Aggarwal Exponents and Powers Exe-4.2 Class 7 ICSE Maths Solutions
ML Aggarwal Exponents and Powers Exe-4.2 Class 7 ICSE Maths Solutions. We Provide Step by Step Answer of Exe-4.2 Questions for Exponents and Powers as council prescribe guideline for upcoming board exam. Visit official Website CISCE for detail information about ICSE Board Class-7.
ML Aggarwal Exponents and Powers Exe-4.2 Class 7 Maths Solutions
Board | ICSE |
Publications | Avichal Publishig Company (APC) |
Subject | Maths |
Class | 7th |
Chapter-4 | Exponents and Powers |
Writer | ML Aggarwal |
Book Name | Understanding |
Topics | Solution of Exe-4.2 Questions |
Edition | 2023-2024 |
Exponents and Powers Exe-4.2
ML Aggarwal Class 7 ICSE Maths Solutions
Page-94
Question 1. Using laws of exponents, simplify and write the following in the exponential form:
Answer:
Question 2. Simplify and write the following in the exponential form:
(i) 53 × 57 × 512
(ii) a5 × a3 × a7
(iii) (712 × 73) ÷ 74
Answer:
(i) 53 × 57 × 512
= 53+7+22
= 522
(ii) a5 × a3 × a7
= a5+3+7
= a15
(iii) (712 × 73) ÷ 74 g
= = 712+3 ÷ 74
= 712-4
= 711
Question 3. Simplify and write the following in the exponential form:
(i) (22)100
(ii) ((-7)6)5
(iii) (32)5 × (34)7
Answer:
Using (am)n = amn
(i) (22)100
= 22×100
= 2200
(ii) ((-7)6)5
= (-7)30
(iii) (32)5 × (34)7
= 32×5 × 34×7
= 310× 328
= 338
Question 4. Simplify and write in the exponential form:
Answer:
Question- 5. Simplify and write in the exponential form:
Answer:
Question -6. Simplify and express each of the following in the exponential form:
Answer:
Question-7. Express each of the following rational numbers in the exponential form:
(i) 25/64
(ii) -125/216
(iii) -343/729
Answer:
Question-8. Simplify the following:
Answer:
Question- 9. Simplify the following:
Answer:
Question -10. Simplify the following:
Answer:
Question -11. Simplify:
Answer:
Question -12. Express each of the following as a product of prime factors in the exponential form:
(i) 108 × 192
(ii) 729 × 64
(iii) 384 × 147
Answer:
Exponents and Powers Exe-4.2
ML Aggarwal Class 7 ICSE Maths Solutions
Page-95
Question 13. Simplify and write the following in the exponential form:
(i) 33 × 22 + 22 × 50
(ii) 92 + 112 – 22 × 3 × 170
Answer:
Question- 14.
(i) By what number should we multiply 34 so that the product is 37?
(ii) By what number should be multiple (-6)-1 so that the product is 10-1?
Answer:
(i) Product = 37
Required number = 37 ÷ 34
= 37-4
= 33
= 27
(ii) Product = 10-1
Required number = 10-1 ÷ (-6)-1
= (1/10) ÷(1/-6) = (1/10) x (-6/1) = (-3/5)
Question 15.
Answer:
Question 16. If (-3)x-1 = -234, then find the value of (-7)x-6.
Answer:
— : End of ML Aggarwal Exponents and Powers Exe-4.2 Class 7 ICSE Maths Solutions :–
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