Add & Subtract Using 20

Week 12, winter-review-2 Lesson 204 Math 1st Grade Aired Week of 11/30/2021
Add & Subtract Using 20

Represent a teen number using a number bond to solve a Mystery Math Mistake. Use Notice and Wonder with a marble game to ask and answer questions about adding and subtracting within 20. Use a Double 10-frame & number line to represent and practice adding and subtracting within 20.