Dreambox Math Challenge- Ms. Swicegood's class completed 307 Dreambox lessons last week. Ms. Still's class completed 196 lessons and Ms. Olmedo's class completed 123 lessons. Together, all three classes completed approximately 4 times as many lessons as Ms. Houde's class last week. About how many lessons did Ms. Houde's class complete last week? (You can use Thinking Blocks, to model using a bar/tape diagram, or a piece of paper.)
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