What number sentence can you write to represent how to find the total using addition?
Look at Part 2. How many lines did Andrea draw to partition the orange rectangle? Where in the rectangle did she draw the lines?
Andrea drew 1 line. She drew the line horizontally, or from side to side, in the middle of the rectangle.
How many lines did Andrea draw to partition the blue rectangle? Where in the rectangle did she draw the lines?
Andrea drew 3 lines. She drew them vertically, or up and down, and she spaced them equally in the rectangle.
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