Geometry - Week 11 - Lesson 2 - Converting Units of Measurement
Lesson: Explain that in the metric system we use, millimetres, centimetres, metres and km’s, see if students know how much each is, ask them what unit would best determine the length of their notebooks? distance to school? distance they walk to their next class? Display this image on the whiteboard and have students copy it into their notebooks. The 2 strategies I’ll use to solve these problems will be either to multiply/divide or to move the decimal point. When multiplying/dividing first find the conversion rate between the unit. If you are going from a larger unit to a smaller unit multiply. If you are going from a smaller unit to a larger unit divide. Present the first part of this video, pause it at: 7:50, and show put these example questions on the whiteboard: 3m = cm? 24cm = mm? 2,5km = m? cm? give students a few minutes to try to work them out on their own, then have a student come up to fill out the answer, model where necessary Present the second part of the video: from 7:50 - the end and put these example questions on the whiteboard. 65mm = cm? 345m = km? 42 800cm =km? Repeat step from above. If you are moving the decimal point, count the number of steps from the unit you are starting to the unit you want to end up at. That is the amount of spaces to move the decimal point. Below are some worksheets that are easier and more difficult. Support: Extension: Conclusion: Have each student solve the following problems. 34 cm = ___ m 561 mm = ___ m 28 m = ___ cm 49 m = ___ km
