By dividing by 10 and then multiplying by 3, calculate of 90 mentally.
Determine the total cost for a shirt if its regular price is $24 and the sales tax is .
Given a student answers of the questions on an exam correctly and 10 questions incorrectly, what was the total number of questions on the exam?
If there is a discount on a TV set, calculate the percentage by which the sale price must be increased in order to get the original price.
If Daniel answered of the questions on his quiz correctly, and the quiz had 10 questions, determine the number of questions he answered correctly.
The value of Scarlett’s car, which was , has decreased by . What is her car worth now?
By dividing by 4, calculate of 900 mentally.
By dividing by 2, calculate of 32 mentally.