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Q.2 Find the number from each of the following expanded forms:
(a) 8 × 10^4 + 6 × 10^3 + 0 × 10^2 + 4 × 10^1 + 5 × 10^0
(b) 4 × 10^5 + 5 × 10^3 + 3 × 10^2 + 2 × 10^0
(c) 3 × 10^4 + 7 × 10^2 + 5 × 10^0
(d) 9 × 10^5 + 2 × 10^2 + 3 × 10^1

Answer :

(a)\( 8 × 10^4 + 6 × 10^3 + 0 × 10^2 + 4 × 10^1 + 5 × 10^0\)
= 8 × 10000 + 6 × 1000 + 0 × 100 + 4 × 10 + 5 × 1
= 80000 + 6000 + 0 + 40 + 5 = 86045
(b)\( 4 × 10^5 + 5 × 10^3 + 3 × 10^2 + 2 × 10^0\)
= 4 × 100000 + 5 × 1000 + 3 × 100 + 2 × 1
= 400000 + 5000 + 300 + 2 = 405302
(c) \( 3 × 10^4 + 7 × 10^2 + 5 × 10^0 \)
= 3 × 10000 + 7 × 100 + 5 × 1
= 30000 + 700 + 5 = 30705
(d)\( 9 × 10^5 + 2 × 10^2 + 3 × 10^1 \)
= 9 × 100000 + 2 × 100 + 3 × 10
= 900000 + 200 + 30 = 900230