video1.0<iframe src="https://www.loom.com/embed/f1ff8d0656dd43b4bd0c03ce97e7847d" frameborder="0" width="1838" height="1378" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>13781838Loomhttps://www.loom.com13781838https://cdn.loom.com/sessions/thumbnails/f1ff8d0656dd43b4bd0c03ce97e7847d-19c088f8a206459e.gif1204.519This Loom solves several Grade 5 non-calculator math problems, with the main emphasis on making and justifying estimates using rounding. It estimates how many seconds a plane taking 213 mph takes to travel one mile, converting hours to seconds and concluding the answer is an overestimate. It then discusses estimating powers and ordering numbers by converting to standard form, plus percentage changes including Tamara’s house dropping 20 percent (from 220,000 to 176,000) and Rahim’s rising 30 percent (from 160,000 to 208,000). It also works through ratio and fractional jar problems, ending with estimating a car journey time of about 10 minutes and explaining the estimate is an overestimate.