We will recall basic facts to add and subtract within 20.
* Use concrete and pictorial models to compose and decompose numbers up to 1,200.
* Add and subtract like units,ones,to solve problems within 100
* Making ten from an addend of 9,8,7
* WE WILL…use standard, word, and expanded forms to represent numbers up to 1,200
* I will add /subtract up to four two-digit numbers using mental math and algorithms.
We will discuss patterns in numbers we are adding and subtracting.
