Mathematics Kindergarten

Strand: OPERATIONS AND ALGEBRAIC THINKING (K.OA)

Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from (Standards K.OA.1–5).

Standard K.OA.3

Decompose numbers less than or equal to 10 into pairs in more than one way by using objects or drawings. Record each decomposition by a drawing or equation. For example, 5 = 2 + 3 and 5 = 4 + 1.

• Bobbie Bear's Buttons
The purpose of this task is for students to find different pairs of numbers that sum to 4.
• Christina's Candies
This task is meant to be presented as a sequence of questions posed by the teacher to the students. Once a student finds one answer, the teacher then asks him/her to find another. The student is asked to use objects, pictures, or equations to demonstrate his/her thinking.
• Kindergarten Mathematics Module 4: Number Pairs, Addition and Subtraction to 10
Module 4 marks the next exciting step in math for kindergartners, addition and subtraction! They begin to harness their practiced counting abilities, knowledge of the value of numbers, and work with embedded numbers to reason about and solve addition and subtraction expressions and equations. In Topics A and B, decomposition and composition are taught simultaneously using the number bond model so that students begin to understand the relationship between parts and wholes before moving into formal work with addition and subtraction in the rest of the module.
• Make 9
In this task students are asked to make 9 in as many ways as they can by adding two numbers between 0 and 9.
• My Book of Five
The purpose of this task is to help students develop fluency with addition facts to 5.
• Pick Two
This task could be used by teachers as an opportunity to gauge their students' ability to write equations and whether they may be ready to begin a discussion about what the equal sign means.
• Quick Images: Visualizing Number Combinations
The educator in this Teaching Channel video uses quick images to identify combinations of 8 - best done in the latter part of Kindergarten. (6 minutes)
• Shake and Spill
The purpose of this task is for students to decompose a number as a sum of two other numbers in more than one way.
• USBE Core Guide for Domain: Operations and Algebraic Thinking (KOA3)
This math guide provides academic vocabulary, instructional strategies, teacher resources, and assessment tasks for the Operations and Algebraic Thinking domain.

http://www.uen.org - in partnership with Utah State Board of Education (USBE) and Utah System of Higher Education (USHE).  Send questions or comments to USBE Specialist - Shannon Ference and see the Mathematics - Elementary website. For general questions about Utah's Core Standards contact the Director - DIANA SUDDRETH .
Email:  diana.suddreth@schools.utah.gov

These materials have been produced by and for the teachers of the State of Utah. Copies of these materials may be freely reproduced for teacher and classroom use. When distributing these materials, credit should be given to Utah State Board of Education. These materials may not be published, in whole or part, or in any other format, without the written permission of the Utah State Board of Education, 250 East 500 South, PO Box 144200, Salt Lake City, Utah 84114-4200.