Objective: Count on to find the unknown part in missing addend equations such as 6 + __ = 9. Answer, “How many more to make 6, 7, 8, 9, and 10?”
Students use these same strategies in Lesson 16, in both result unknown and the more complex change unknown equations, solving problems such as 4 + ___ = 7 as they say, “5, 6, 7” (1.OA.8).
There may be cases when our downloadable resources contain hyperlinks to other websites. These hyperlinks lead to websites published or operated by third parties. UnboundEd and EngageNY are not responsible for the content, availability, or privacy policies of these websites.