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How can I effectively teach so that my students understand this topic on conversion of units of measurement such as cm, m and km? For example: most students find it difficult to comprehend that 715 cm = 7.15 m but 2.12 m = 212 cm It becomes frustrating for me to teach since they cannot understand 1cm = 1/100 m or 1 m = 1/1000 km. Would you recommend some great activity that I can carry out to make them understand better? Thank you.
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