```Kindergarten Unit 3
Purpose Of This Unit:
This unit is designed to introduce the concept of joining (addition) and separating (subtraction) in the context of word
problems. This unit follows student’s understanding of skills related to counting and cardinality.
Unit Overview
In this unit students will….
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Use objects and pictures to represent real-world situations that involve joining (addition) and removal (subtraction).
Accurately solve real-world addition and subtraction problems.
Explore the addition and subtraction symbols while solving real-world problems.
Communicate their strategies used while solving addition and subtraction problems.
Identify whether the number of objects in a group is greater than, less than or equal to the number of objects in another
group.
Use one-to-one correspondence or other counting strategy
Understand the relationship between number labels (such as “4” naming a collection of four) and quantities.
Understand that counting by ones increases the quantity by one more.
Compare two numbers between one and ten when presented as written numerals.
Use addition and subtraction to solve problems.
Use strategies to solve problems (such s counting on, counting back, making ten).
Explain their strategy and reason for using it with others.
Unit 3:
CCSS
Standards
Comparing
K.CC.3
Numbers and
K.CC.5
Description
Write numbers from 0 to 20. Represent a number of objects with a written numeral 020 (with 0 representing a count of no objects).
Count to answer “how many?” questions about as many as 20 things arranged
in a line, a rectangular array, or a circle, or as many as 10 things in a scattered
configuration; given a number from 1–20, count out that many objects
K.CC6
Identify whether the number of objects in one group is greater than, less than, or
equal to the number of objects in another group, e.g., by using matching and
counting strategies.
K.CC.7
Compare two numbers between 1 and 10 presented as written numerals.
K.OA.1
Represent addition and subtraction with objects, fingers, mental images, drawings,
sounds (e.g., claps), acting out situations, verbal explanations, expressions, or
equations.
K.OA.2
Solve addition and subtraction word problems, and add and subtract within 10, e.g.,
by using objects or drawings to represent the problem.
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).
K.OA.5
Fluently add and subtract within 5.
What Students Should Be Able to Do By the End of the Unit
Write numbers from 0-10 (K.CC.3)
Write numbers from 11-20 (K.CC.3)
Represent a group of objects with a written numeral 0-20 (K.CC.3)
Count objects up to 20 in a variety of arrangements. (K.CC.5)
Say "how many" objects are in a group. (K.CC.5)
Show the correct number of objects when I am told a number up to 20. (K.CC.5)
Say which group has more by matching or counting the number of objects in both groups. (K.CC.6)
Say which group has less by matching or counting the number of objects in both groups. (K.CC.6)
Say when groups are equal by matching or counting. (K.CC.6)
Tell the values of numbers to 10. (K.CC.7)
Compare two numerals between 1 and 10 and say which has a greater value. (K.CC.7)
Explain subtraction (taking apart and taking from). (K.OA.1)
Identify the mathematical symbols used to show addition and subtraction. (K.OA.1)
Show addition and subtraction using objects, fingers, sounds, acting out situations, expressions, and
equations. (K.OA.1)
Add and subtract numbers within 10. (K.OA.2)
Solve addition and subtraction word problems using objects and drawings. (K.OA.2)
Decompose (break apart) numbers to 10 using objects or drawings. (K.OA.3)
Record the answer using a drawing or equation. K.OA.3)
Easily subtract numbers when the starting number is 5 or less. (K.OA.5)
Vocabulary Words Students Should Know and Be Able to Use
Bundle
Compare
Compose
Decompose
Greater Than
difference
digit
equation
sum
how many
put together
numerals
Less than
More
Fewer
Symbol
count
counting on
fluency
word problem
put together
relationship
subtract
subtraction
take apart
take from
Lesson Planning
(Part I)
This 8 Lesson Unit will cover the following Standards.
K.CC.5
K.OA.1
K.OA.2
K.OA.5
Following this link will take you to the Kindergarten Adding and Subtracting Unit:
http://maccss.ncdpi.wikispaces.net/file/view/Kindergarten%20Unit.pdf/307156880/Kindergarten%20Unit.pdf
Kindergarten Lessons For Comparing and Addition and Subtraction
(Part II)
The Following Lessons will cover the following standards:
K.CC.6
K.CC.7.
K.OA.1
K.OA.2
K.OA.5
The Following Link below will take you to Lessons for Comparing and Addition and Subtraction Word Problems:
More Less
Rolling More
Number Battle
Ant Math Stories
Problem at the Picnic
Jungle Math
Ocean Stories
Pond Stories
Race to Five
K.CC.6
K.CC.6
K.CC.7
K.OA.1
K.OA. 1
K.OA.2
K.OA.2
K.OA.2
K.OA.5
Lessons for Writing Numbers from 0-20
(Part III)
Everyday Math Resources for the following Standard:
K.CC.3
Everyday Mathematics Teachers Guide to Activities:
3.9
4.12
4.16
7.10
Problem Solving Resources
The Following Link Below will take you to the Problem Solving Table and Problem Solving Structures. Make sure to scroll
down the page to access all resources.
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