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(B) Given equation: $10^{3} 	imes 100^{3} + 999999999 = 10^{?} + 10^{?}$Step $1$: Simplify the left side.$100^{3} = (10^{2})^{3} = 10^{6}$.So,$10^{3}

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$9$

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(B) Given equation: $10^{3} 	imes 100^{3} + 999999999 = 10^{?} + 10^{?}$Step $1$: Simplify the left side.$100^{3} = (10^{2})^{3} = 10^{6}$.So,$10^{3} 	imes 10^{6} = 10^{3+6} = 10^{9}$.Step $2$: Approximate the constant.$999999999$ is approximately $1000000000$,which is $10^{9}$.Step $3$: Substitute back into the equation.$10^{9} + 10^{9} = 10^{?} + 10^{?}$.Comparing both sides,we get $? = 9$.

What value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)
$10^{3} \times 100^{3} + 999999999 = 10^{?} + 10^{?}$

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What value will come in place of the question mark (?) in the following question? (You are not expected to calculate the exact value)$10^{3} \times 100^{3} + 999999999 = 10^{?} + 10^{?}$