Question

A $36 dress is on sale for 10% off the regular price. Mentally calculate 10% of $36. Describe the method you used to arrive at your answer.

Answer 1

We know that 10% of something is the tenth part of whaterver we are considering. Then, 10% of $36 is the tenth part, that is, $3.6. We can obtain the tenth part just by moving the decimal point one position to the left.