Mathematical Process Standards>Selecting Tools and Techniques to Solve Problems(TEKS.Math.6.1.C) Practice Test

A fabric store sells cloth for 13.78 per yard. You need 6.42 yards and want the exact cost before tax. You could multiply by hand, estimate, or use technology. Which tool would be most appropriate to get an accurate answer quickly?

You are checking if 160 dollars is enough to buy 21 notebooks priced at 7.89 each. You only need to know if your budget is enough, not the exact total. Which technique would be most efficient?