Question

The estimated quotient of $75$ $÷$ $23$ is ___ by rounding off each number to nearest tens.

Answer 1

$75$ rounded off to nearest ten $=80$.
Because, the unit digit is $5\ge 5$, so $75$ can be written as $80$.
$23$ rounded off to nearest ten $=20$.
Because, the unit digit is $3<5$, so $23$ can be written as $20$ only.
Thus, $80÷20=4$