Directions (Set of 5 questions): What approximate value should come in place of the question marks(?) in the following questions? (Note : you are not expected to calculate the exact value.)
$18491~\div 131+13184~\div 89+~{{121.81}^{2}}=~?$
Solution
$18491~\div 131+13184~\div 89+~{{121.81}^{2}}=~?$
$?~\approx 18491~\div 131+13184~\div 89+~{{122}^{2}}$
$?=141.15+148.13+14884$
$?~\approx 141+148+14884$
$?=15173$