Question

Fill in the blanks:

$7\times {10}^8+9\times {10}^7+1\times {10}^6+2\times {10}^5+3\times {10}^4+6\times {10}^3+5\times {10}^2+9\times {10}^1+9\times {10}^0=...................$

Answer 1

Whenever we write the expanded form of any number, we write in the form of a summation of the place values of each digit.

Let's write the expanded form of number to normal form -

$$\begin{gathered} 7\times {10}^8+9\times {10}^7+1\times {10}^6+2\times {10}^5+3\times {10}^4+6\times {10}^3+5\times {10}^2+9\times {10}^1+9\times {10}^0 \\ =7\times 100000000+9\times 10000000+1\times 1000000+2\times 100000+3\times 10000+6\times 1000+5\times 100+9\times 10+9\times 1 \\ =700000000+90000000+1000000+200000+30000+6000+500+90+9 \\ =791236599 \end{gathered}$$

Hence, the missing term is $791236599$.