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In this section, students learn about odd and even numbers, building on their experience with sharing objects with another person or with making pairs out of a set of objects. They begin by noticing that some groups of objects can be made into two equal groups without a “leftover” and other groups can be made into two equal groups with...
In this section, students learn that a rectangular array contains objects arranged into rows and columns, with the same number of objects in each row and the same in number of objects in each column.
Using this structure, students can skip-count by the number in each row or in each column to find the total number of objects. They can...