Question

Write the following numbers in the expanded form:
(i) 279404
(ii) 3006194
(iii) 2806196

[3 Marks]

Answer 1

Each option: 1 Mark

i) 279404 = 2,00,000 + 70,000 + 9,000 + 400 + 00 +4

=$2\times 100000+7\times 10000+9\times 1000+4\times 100+0\times 10+4\times 1$

= $2\times {10}^5+7\times {10}^4+9\times {10}^3+4\times {10}^2+0\times {10}^1+4\times {10}^0$

ii) 3006194 = 30,00,000 + 0 + 0 + 6,000 + 100 + 90 + 4

=$3\times 1000000+0\times 100000+0\times 10000+6\times 1000+1\times 100+9\times 10+4\times 1$

=$3\times {10}^6+0\times {10}^5+0\times {10}^4+6\times {10}^3+1\times {10}^2+9\times {10}^1+4\times {10}^0$

iii) 2806196 = 20,00,000 + 8,00,000 + 0 + 6,000 + 100 + 90 + 6

= $2\times 1000000+8\times 100000+0\times 10000+6\times 1000+1\times 100+9\times 10+6\times 1$

=$2\times {10}^6+8\times {10}^5+0\times {10}^4+6\times {10}^3+1\times {10}^2+9\times {10}^1+6\times {10}^0$