# AP Board 7th Class Maths Solutions Chapter 8 Exponents and Powers Ex 8.3

SCERT AP 7th Class Maths Solutions Pdf Chapter 8 Exponents and Powers Ex 8.3 Textbook Exercise Questions and Answers.

## AP State Syllabus 7th Class Maths Solutions 8th Lesson Exponents and Powers Ex 8.3

Question 1.
Write the following numbers in expanded form.
(i) 23468
23468 = (2 × 10,000) + (3 × 1000) + (4 × 100) + (6 × 10) + (8 × 1)
= (2 × 104) + (3 × 103) + (4 × 102) + (6 × 101) + (8 × 1)

(ii) 120718
120718 = (1 × 1,00,000) + (2 × 10,000) + (0 × 1000) + (7 × 100) + (1 × 10) + (8 × 1)
= (1 × 105) + (2 × 104) + (7 × 102) + (1 × 101) + (8 × 1)

(iii) 806190
806190 = (8 × 1,00,000) + (0 × 10,000) + (6 × 1000) + (1 × 100) + (9 × 10) + (0 × 1)
= (8 × 105) + (6 × 103) + (1 × 102) + (9 × 101)

(iv) 3006194
3006194 = (3 × 10,00,000) + (0 × 1,00,000) + (0 × 10,000) + (6 × 1000) + (1 × 100) + (9 × 10) + (4 × 1)
= (3 × 106) + (6 × 103) + (1 × 102) + (9 × 101) + (4 × 1)

Question 2.
Write the following numbers in standard fortti:
(i) 5,00,000
5,00,000 = 5 × 1,00,000 = 5 × 105

(ii) 48,30,000
48,30,000 = 4.830000 × 10,00,000 (Decimal is shifted six places to the left).
= 4.830000 × 106
∴ 48,30,000 = 4.83 × 106

(iii) 3,94,00,00,00,000
3,94,00,00,00,000 = 3.94000000000 × 100000000000 = 3.94 × 1011

(iv) 30000000
30000000 = 3 × 10000000 = 3 × 107
∴ 30000000 = 3 × 107

(v) 180000
180000 = 1.80000 × 100000 = 1.8 × 105

Question 3.
Express the number appearing in the following statements in standard form,
(i) The Universe is estimated to be about 12,000,000,000 years old.