Unit 7

Number Operations and Algebraic Thinking




Unit Length and Description:


This unit should last approximately 4 weeks.


This unit focuses on understanding addition as putting together and adding to, and understanding subtraction as taking apart and taking from. Fluency in adding and subtracting within 5 and counting by ones and tens to 100 are also focuses.




Standards: Instructional Outcomes

Operations and Algebraic Thinking

K.OA.3: Decompose numbers less than or equal to 10 into pairs in more than one way, e.g. by using objects or drawings, and record each decomposition by a drawing or equation (e.g. 5 = 2 + 3 and 5 = 4 + 1).

        I can show numbers to 10 with different groups.


K.OA.4: For any number 1 to 9, find the number that makes 10 when added to the given number, e.g. by using objects or drawings, and record the answer with a drawing or equation.

        I can add two numbers to make 10.

        I can find a missing number to make 10.


Number and Operations in Base Ten

K.NBT.1: Compose and decompose numbers from 11 to 19 into ten ones and some further ones, e.g., by using objects or drawings, and record each composition or decomposition by a drawing or equation (e.g., 18 = 10 + 8); understand that these numbers are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.

        I can make a number using a group of ten and ones.

        I can tell how many tens and ones are in a number.



Enduring Understandings:


        Addition is putting together and adding to.

        Subtraction is taking apart and taking from.

        Problems can be solved in different ways.

        Problems can be modeled using objects, pictures, and words.

        Various combinations of numbers can be used to represent the same quantity.


Essential Questions:


        When do I add?

        When do I subtract?

        How can I represent problems using objects, pictures, and numbers?

        How can I use different combinations of numbers to represent the same quantity?

        How can strategies help me when playing a math game?

        How can strategies help use solve problems?

       How can you model a math problem with objects or pictures?