## 9 Rocks and Balls.docx - Section 3: Center Time

9 Rocks and Balls.docx

# Combinations, Day 1

Unit 2: Working with Numbers, Operations, and Story Problems
Lesson 3 of 11

## Objective: SWBAT solve a problem in which the total and one part are known. SWBAT find as many 2 addend combinations for 9 as possible.

### Thomas Young

203 Lessons14 new

## Big Idea: Explorations of combinations! Two missing addend games and a story problem, focusing on finding combinations of 9, what else could a 1st grade teacher want.

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Standards:
Subject(s):
Math, Number Sense and Operations, Operations , 1st Grade, Counting on, missing addend, combinations of numbers, word problems
65 minutes

### Thomas Young

203 Lessons | 14 new

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