Addition and subtraction within 20 - 1st Grade Math 1.OA.A.1

Описание к видео Addition and subtraction within 20 - 1st Grade Math 1.OA.A.1

In this lesson with Boddle, students will be led through example problems showing how to count a group of items and add that number to another group of items to find the sum. Students will also see an example showing how to count a group of items and subtract that number from another group of items to find the difference.

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