Let’s estimate the solution to $24\times24$24×24 by rounding the digits first.
Rewrite the calculation but use rounded numbers to the nearest $10$10.
$\editable{}\times\editable{}$×
Calculate $20\times20$20×20.
Is $400$400 going to be larger or smaller than the actual result of $24\times24$24×24?
Smaller
Larger
Let’s estimate the solution to $28\times38$28×38 by rounding the digits first.
Let’s estimate the solution to $87\times22$87×22 by rounding the digits first.
Let’s estimate the solution to $224\times73$224×73 by rounding the digits first.