6, Lesson 37, Unit 1, Grade 1, EngageNY icon
Problem Set

Problem Set

Lesson 37. Unit 1. Grade 1 EngageNY

EngageNY10 min(s)

This Problem Set is a part of the Lesson 37, Unit 1, Grade 1.<br> In this lesson, students solve using Rekenrek bracelets and number bonds to show how "partners of 9" lead to related subtraction number sentences. For example, they notice that 9 - 8 = 1 and 9 - 1 = 8 are shown in similar ways with their Rekenrek bracelets (both starting with 9, and involving a group of 1 and a group of 8), and that knowing one subtraction sentence allows them to quickly know the other.

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