Dividing by 10 and multiplying by 10 is an integral skill for young scholars as they learn base-10 multiplication and division. First, they match five products to their equivalent equations, all of which include 10 as a factor. Next, mathematicians match division equations (all with 10 as the divisor) to quotients. What do they notice about these number sentences? Encourage analysis and consider bringing out the hundreds chart as a clue.