Calculating Sales Tax and Total Cost by Hand

Math with Mr. J

This instructional video provides a clear, step-by-step guide on how to calculate sales tax and total cost by hand, without the aid of a calculator. The video breaks down the process into three distinct phases: converting the percentage tax rate into a decimal, performing long multiplication to determine the tax amount, and adding that amount to the original price to find the total cost. The instructor, Mr. J, models standard algorithms for decimal operations on a virtual chalkboard.