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1st Grade Number Activities
This page provides examples of 1st Grade Number Activities aligned with the Common Core State Standards. All activities are suitable for use in Math Centers, small group or whole class settings and are designed to elicit a range of responses and provide opportunities for students to communicate their reasoning and mathematical thinking. All files for the 1st Grade Number Activities listed are in PDF format and can be accessed using Adobe Reader. For more 1st Grade math ideas click on the eBook covers on the left.
1st GRADE NUMBER ACTIVITIES: OPERATIONS AND ALGEBRAIC THINKING
Represent and solve problems involving addition and subtraction
1.OA1
Use addition and subtraction within 20 to solve one and two step word
problems involving situations of adding to, taking from, putting
together, taking apart, and comparing, with unknowns in all positions,
e.g. by using drawings and equations with a symbol for the unknown
number to represent the problem.
One Duck Stuck
The Very Hungry Caterpillar
One Hunter
Rooster's Off to See the World
Two of Everything
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1.OA2 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.
Word Problems with 3 Addends
Find 3 Cards
Three Letter Addends
Understand and apply properties of operations and the relationship between addition and subtraction
1.OA3
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) 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).
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Possible Activities: |
 
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Domino Addition Domino Addition Recording Sheet |
1.OA4 Understand subtraction as an unknown-addend problem. For
example, subtract 10-8 by finding the number that makes 10 when added to
8.
Possible Activities:
Ten Frame Subtraction
Add and subtract within 20
1.OA5 Relate counting to addition and subtraction (e.g. by counting on 2 to add 2).
Possible Activities:
Show One More
Show One Less
One More on the 10 Frame
One More/One Less Scoop
1.OA6
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).
Work with addition and subtraction equations
1.OA7 Understand
the meaning of the equal sign, and determine if 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
True or False?
Equal Sums
1.OA8 Determine the unknown whole number in an addition or
subtraction equation relating to three whole numbers. For example,
determine the unknown number that makes the equation true in each of the
equations 8+ ? =11, 5 = □ – 3, 6+6 = □
Find the Missing Number
1st GRADE NUMBER ACTIVITIES: NUMBER AND OPERATIONS IN BASE TEN
Extend the counting sequence
1.NBT1 Count to 120,
starting at any number less than 120. In this range, read and write
numerals and represent a number of objects with a written numeral.
Missing Numbers Grids 1-50
Understand place value
1.NBT2
Understand that the two digits of a two-digit number represent amounts
of tens and ones.Understand the following as special cases:
a. 10 can be thought of as a bundle of ten ones – called a “ten.”
b. The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones.
c.
The numbers 10, 20, 30, 40, 50, 60, 70, 80, 90 refer to one, two,
three, four, five, six, seven, eight, or nine tens (and 0 ones).
1.NBT3 Compare two two-digit numbers based on meanings of the
tens and ones digits, recording the results of comparisons with the
symbols >, =, and <.
Possible Activities:
Ten Frame Compare
Comparing Two Digit Numbers
Scoop It
Use place value understanding and properties of operations to add and subtract
1.NBT4 Add
within 100, including adding a two-digit number and a one-digit number,
and adding a two-digit number and a multiple of 10, using concrete
models or drawings and strategies based on place value, properties of
operations, and/or the relationship between addition and subtraction;
relate the strategy to a written method and explain the reasoning used.
Understand that in adding two-digit numbers, one adds tens and tens,
ones and ones, and sometimes it is necessary to compose a ten.
More 1st Grade Number Read-Alouds
More 1st Grade Number Resources
