Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 – 4 = 13 – 3 – 1 = 10 – 1 = 9); using the relationship between addition and subtraction (e.g., knowing that 8 + 4 = 12, one knows 12 – 8 = 4); and creating equivalent but easier or known sums (e.g., adding 6 + 7 by creating the known equivalent 6 + 6 + 1 = 12 + 1 = 13).


Quarter 1

Quarter 2

Quarter 3

Quarter 4

Add and subtract within 20, developing fluency for addition and subtraction within 10*. Add and subtract within 20 using strategies such as:

Counting on (+/- 1 and 2)

* HCPSS includes 9 + 2
Add and subtract within 20, developing fluency for addition and subtraction within 10. Add and subtract within 20 using strategies such as:

Make Ten (i.e., 6 + 4 = 10, 10 – 3 = 7)
Add 0
Add and subtract within 20, developing fluency for addition and subtraction within 10*. Add and subtract within 20 using strategies such as:

Doubles (i.e., 4 + 4 = 8, 6 = 3 - 3)

* HCPSS includes doubles beyond 10
Add and subtract within 20, demonstrating fluency for addition and subtraction within 10*. Add and subtract within 20 using strategies such as:

+10 (i.e. 5 + 10 = 15)

* HCPSS includes as foundation for upcoming strategies
Chapter 2
basic_facts_addition.jpg
Chapters 3 and Six
basic_facts_addition.jpg
Chapter 5
basic_facts_addition.jpg
Chapter 4
basic_facts_addition.jpg
SAW3 Resources
+1/+2
Lesson, PowerPoint
-1/-2
Lesson, PowerPoint
Fact Cards
Logs
Games
SAW3 Resources
Make 10
Lesson, PowerPoint
Make 10 Enrichment
Lesson1, PowerPoint1
Lesson2, PowerPoint2
Fact Cards
Logs
Games

+/- Zero
Lesson, PowerPoint
+/- Zero Enrichment
Lesson, PowerPoint
Fact Cards
Logs
Games
SAW3 Resources
Adding Doubles
Lesson, PowerPoint
Subtracting Halves
Lesson, PowerPoint
Fact CardsLogsGames

SAW3 Resources
+Ten Lesson, Resource, PowerPoint+Ten Enrichmentt Lesson, PowerPointFact Cards and LogsGames


Enduring Understanding

Mathematical operations are used in solving problems in which a new value is produced from one or more values.
Algebraic thinking involves choosing, combining, and applying effective strategies for answering quantitative questions.

Essential Questions

In what ways can operations affect numbers?
How can different strategies be helpful when solving a problem?

Vocabulary (online dictionary, HCPSS Vocabulary Cards)

addition, add, subtraction, subtract, count on, count back, doubles, make ten

About the Math

This standard is connected to basic facts and resources from HCPSS Strategies at Work program should be used to teach these strategies. This standard should cover several months of the year and students should begin to show fluency in their fact acquisition as the year progresses.

Rich Tasks for Multiple Means of Engagement, Expression, and Representation (UDL)

  • Calculator Doubles (Van de Walle, K-3, p 101) Use the calculator and enter the "double maker" (2 X =) Let one child say, for example, "Seven plus seven." The child with the calculator should press 7, try to recall the double (14) and then press = to see the correct double on the display. (Note that the calculator is also a good way to practice +1 and +2 facts.)

  • Make 10 on the Ten-Frame (Van De Walle, K-3, p 103). Give students a mat with two ten-frames. A flash card can be shown or a fact can be said orally that represents a make ten and some more fact (ex 7 + 9). The students should first model each number on each of the separate ten-frames and then decide on the easiest way to show (without counting all) what the total is. The obvious (but not the only) choice is to move counters from one ten frame to make 10 on the other, Then you have 10 and whatever is leftover. DoubleTens.png

  • Say The Ten Fact (Van de Walle, K-3, p 106) Hold up a ten-frame and have children say the "ten fact". For a card with 7 dots, the response is "seven and three is ten." Later, with a blank ten-frame drawn on the board, say a number less than 10. Children start with that number and complete the "ten fact". If you say "four", they say, "four plus six is ten." (Little Tens Frames)

  • Van de Walle, K-3, Activity 4.5 "Double Images" Page 101
DoublesFacts.png

Rich Problem:
The total of two numbers is ten. What might the two numbers be? (Lilburn and Ciurak, Investigations, Tasks and Rubrics to Teach and Assess Math, p 30)
VDW-k-3.png

Web Resources:


hcps 092810 630.jpg
hcps 092810 666.jpg
hcps 092810 723.jpg
DSC_5883.jpg
Games and Centers
Lessons
Student Resources
Video Segments
Printable Games
Plus One Game (two dice)
Elevator Ride
One Less (11-20)
Make Ten Game
Facts of Ten
Fact Family House
Number Sentence Match
Sums of Ten
Addition Domino Train
I Have...Who Has? (Easy Facts)
Strike it Out
Smart Sums

Printable CentersDoubles FactsMake 10 on the Ten FrameMake 10 SquaresDot Card Addition
Near Double Match

Online GamesNumber Pairs to Make 20How Many Under the Shell?

Instructional Ideas
Teaching Doubles
Teaching Make 10
Teaching +1,+2
Teaching Near Doubles
Bonds of Ten

Lesson Seeds
Rule It Out
Ten Pennies

Lesson Series
Let's Learn Those Facts
Fact Family Templates
Doubles Flash Cards
Make Ten Flash Cards
Make Ten Bond Cards
Bridging Scaffold Sheets For Make 10
Near Doubles Flash Cards
Doubles Dice

Add 10 Grab Bag Recording Sheet
(Erin Reisberg, Centennial Lane)









Children's Literature

Click on the book for additional activities.
Bob the Builder.png

Jack the Builder

Double the Ducks.png

Double the Ducks
MathForAllSeasons.gif
Math for All Seasons
by Greg Tang


Questions/Comments:

Contact John SanGiovanni at jsangiovanni@hcpss.org.


Use and Sharing of HCPSS Website and Resources:Creative_Commons.png
Howard County Public Schools Office of Elementary Mathematics Curricular Projects has licensed this product under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 Unported License.