Unit 1, Lesson 38
Look for and make use of repeated reasoning and structure using the addition chart to solve subtraction problems.
EngageNY 60 min(s)
In this lesson, students relate subtraction problems to the addition chart. For example, when presented with 7 - 3, students apply their knowledge of the decompositions of 7 to solve, and discuss where to find related addition expressions (3 + 4 and 4 + 3) on the addition chart.
