The document provides information about a first grade math unit on subtraction from The Moffatt Girls math curriculum. It includes the standards covered in Unit 3, which focus on subtraction within 20, properties of operations, fluency with addition and subtraction within 10, the meaning of the equal sign, and solving word problems. It describes the unit's NO PREP practice pages and math centers to provide practice and application of skills in an engaging way. Pictures show examples of the practice pages and centers being used in the classroom.

1. SUBTRACTION
Unit
3
FIRST GRADE
A T H
M
Created by The Moffatt Girls
math made fun
FIRST GRADE

2. First Grade Math Unit 3
These First Grade Math Units are designed to make learning math FUN,
hands-on and engaging. The units can be used as a whole math curriculum
or as a supplement into any classroom/homeschool math instruction.
What is covered in Unit 3?
In Unit 3, students will cover the following grade level standards:
1.OA.1 Use addition and subtraction within 20 to solve word problems involving
situations of adding to, taking from, putting together, taking apart, and
comparing, with unknowns in all positions, e.g., by using objects, drawings, and
equations with a symbol for the unknown number to represent the problem.
1.OA.2 Solve word problems that call for addition of three whole numbers whose
sum is less than or equal to 20, e.g., by using objects, drawings, and equations
with a symbol for the unknown number to represent the problem.
1.OA.3 Apply properties of operations as strategies to add and subtract.
Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative
property of addition.) To add 2 + 6 + 4, the second two numbers can be added
to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.
1.OA.4 Understand subtraction as an unknown-addend problem. For example,
subtract 10-8 by finding the number that makes 10 when added to 8.
1.OA.5 Relate counting to addition and subtraction (e.g., by counting on 2 to
add 2)
1.OA.6 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.
1.OA.7 Understand the meaning of the equal sign, and determine if the
equations involving addition and subtraction are true or false. For example,
which of the following equations are true and which are false? 6 = 6,
7 = 8 – 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2.
1.OA.8 Determine the unknown whole number in an addition or subtraction
equation relating three whole numbers. For example, determine the unknown
number that makes the equation true in each of the equations 8 + ? = 11, = ? – 3,
6 + 6 = ?

3. How are the Units Covered?
Each unit will offer two components to help make the math units
meaningful and engaging for whole group, small group or
individual lessons. The First Grade Math Units can be a
supplemental resource for current math curriculum, or it can be
used as a whole math curriculum. The curriculum is designed to
give the teacher flexibility and freedom to rearrange the units to
fit the needs of his/her students. Since there are so many practice
pages and centers in each unit, the teacher can use many of the
pages as a spiral review as the year progresses.
***NO PREP Practice Pages- We all know that kids need lots of
practice to master math concepts and make them concrete.
Each First Grade Math Unit will have a variety of fun NO PREP
practice/worksheet pages for students to practice, practice,
practice! These NO PREP practice pages allow students to master
math concepts through games, coloring, and more!
Component Number 1
***Math Centers- Each unit will have a variety of math
centers/stations to help students practice and apply skills and
strategies taught within the math unit. These math centers are
purposeful and help to make each math concept more
concrete.
Math centers/stations increase student motivation by:
*Providing meaningful learning opportunities
*Fostering independence
*Allow for differentiation
*Best of all…they make learning math FUN!
Component Number 2

4. How to Teach the Units…
The grade level standards for each practice page and center are
clearly indicated on the First Grade Math Standard Sheet. There is
no guessing as to what standard is being covered. The best part
about these units is that you KNOW for sure that ALL the standards
are being covered. This type of resource makes it easy for the
teacher to supplement their current math curriculum or
implement these units as new curriculum.
This comprehensive and full First Grade Math Curriculum ensures
that all grade-level math standards are being covered in a variety
of ways! The units allow for critical thinking, use of manipulatives,
fun and engaging practice pages, and interactive centers that
are sure to keep your students wanting more math!
SPECIFIC GRADE LEVEL STANDARD
PAGE NUMBERS AND THE
STANDARDS THAT ARE COVERED
L

5. A Look at the NO PREP Practice Pages

6. A Look at the NO PREP Practice Pages

7. A Look at the NO PREP Practice Pages

8. A Look at the Centers in Action…
Center #1 Center #2
Center #3 Center #4
Center #5 Center #6

9. A Look at the Centers in Action…
Center #7 Center #8
Center #9 Center #10
Center #11 Center #12

10. A Look at the Centers in Action…
Center #13 Center #14
Center #15 Center #16
Center #17 Center #18

11. A Look at the Centers in Action…
Center #19 Center #20
Center #21 Center #22
Center #23 Center #24

12. A Look at the Centers in Action…
Center #25 Center #26
Center #27 Center #28
Center #29 Center #30

13. A Look at the Centers in Action…
Center #31

14. How to Organize the Units
Organizing the units is essential for student and teacher success. The
NO PREP Practice pages only require you to print and teach. I like
to keep mine in a one-inch binder in sheet protectors.
Organizing
Math
Centers

15. How to Organize the Units
Once the centers are organized, simply put each center in plastic
baggies. I place all of my baggies for each unit in a Sterilite
container for easy organization.

16. What materials do I need to set up Unit 3?
My goal is to make these math units as fun for the kids as possible,
while providing as minimal prep as possible for the teacher. The
math centers will take some prep, but it is your choice to print in
color or black and white. I did laminate my centers for durability.
A quick view of the materials you need:
1” Binder Sheet Protectors
Gallon Storage
Bags for storing
centers
Sterilite Large Clip
Box with latches Colored Paper
Dry Erase Markers
Two Colored
Counters
Spinners

17. FIRST GRADE
A T H
M
SUBTRACTION
Unit
3
Created by The Moffatt Girls
math made fun
Grade Level Standards for Unit 3:
Operations and Algebraic Thinking
Use addition and subtraction within 20 to solve word problems involving situations of
adding to, taking from, putting together, taking apart, and comparing, with unknowns
in all positions, e.g., by using objects, drawings, and equations with a symbol for the
unknown number to represent the problem. 1.OA.1
Ÿ
Ÿ
Ÿ
Apply properties of operations as strategies to add and subtract. Examples: If 8 + 3 =
11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To
add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2
+ 10 = 12. (Associative property of addition. 1.OA.3
ŸAdd 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. 1.OA.6
ŸUnderstand the meaning of the equal sign, and determine if the equations
involving addition and subtraction are true or false. For example, which of the
following equations are true and which are false? 6 = 6,
7 = 8 – 1, 5 + 2 = 2 + 5, 4 + 1 = 5 + 2. 1.OA.7
Ÿ
Ÿ
Solve word problems that call for addition of three whole numbers whose sum is less
than or equal to 20, e.g., by using objects, drawings, and equations with a symbol for
the unknown number to represent the problem. 1.OA.2
Relate counting to addition and subtraction (e.g., by counting on 2 to add 2)
1.OA.5
Determine the unknown whole number in an addition or subtraction equation
relating three whole numbers. For example, determine the unknown number that
makes the equation true in each of the equations 8 + ? = 11, = ? – 3, 6 + 6 = ? 1.OA.8
ŸRelate counting to addition and subtraction (e.g., by counting on 2 to add 2)
1.OA.4