Choose the expression would be best to use for 62 × 23?

The correct answer is: 60 × 20

Here , we given by expression 62 x 23, we need to find out the best expression for the produce.
First find the product of this expression :
62 x 23
=1426
And it is mentally difficult of calculate , so we need to round the number and find the compatible number which is best for the expression.
Now,
62 → 60 ,here the 62 rounded down into 60
And,
23 → 20 , here the 23 rounded down into 20
62→60
23→20
There fore the best expression for 62 x 23 would be:
60 x 20
So , The answer is 60 x 20 (option (c)).

To find the best expression you need to focus on the best compatible number of the actual expression , Just rounded the number and then the product of the number is best expression.  Apply same methods in similar questions.