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This page provides examples of 2nd 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. Instructions for each task are typed in large print and written in childfriendly language to enable students to work on activities independently after a brief introduction to the task. All files for the 2nd Grade Number Activities listed are in PDF format and can be accessed using Adobe Reader. For more 2nd Grade math ideas click on the above eBook covers.
2nd Grade Numbers of the Week Use for morning work or as homework.
Represent and solve problems involving addition and subtraction
2.OA1
Use addition and subtraction within 100 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.
Possible Activities: 
Math Read Aloud Task Cards: One Hunter P. Bear's New Year's Party The Napping House 
Add and subtract within 20
2.OA2 Fluently add and
subtract within 20 using mental strategies. By end of Grade 2, know from
memory all sums of two onedigit numbers.
Work with equal groups of objects to gain foundations for multiplication
2.OA3 Determine
whether a group of objects (up to 20) has an odd or even number of
members, e.g. by pairing objects or counting them by 2s; write an
equation to express an even number as a sum of two equal addends.
Possible Activities: 
2.OA4 Use addition to find the total number of objects arranged
in rectangular arrays with up to 5 rows and up to 5 columns; write an
equation to express the total as a sum of equal addends.
Possible Activities:
Making Arrays
Making Different Sized Squares
Building Arrays
Understand place value
2.NBT1 Understand that the three
digits of a threedigit number represent amounts of hundreds, tens, and
ones. Understand the following as special cases:
a. 100 can be thought of as a bundle of ten tens – called a “hundred.”
b.
The numbers 100, 200,300,400,500,600,700,800,900 refer to one, two,
three, four, five, six, seven, eight, nine hundreds (and 0 tens and 0
ones).
Possible Activities: Two Ways to Count to Ten 
2.NBT3 Read and write numbers to 1000 using baseten notation, number names, and expanded form.
Possible Activities:
Make 6 Numbers
Number Word Concentration
Representing Numbers in Four Ways
Number Writing Barrier Game
Roll 3 Digits
2.NBT4 Compare two threedigit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols.
Possible Activities:
Comparing 3 Digit Numbers
Place Value Challenge (3 Digits)
Use place value understanding and properties of operations to add and subtract
2.NBT5
Fluently add and subtract within 100 using strategies based on place
value, properties of operations, and/or the relationship between
addition and subtraction.
Possible Activities: 
Keep on Doubling 
2.NBT6 Add up to four twodigit numbers using strategies based on place value and properties of operations.
Possible Activities:
Make 100
Twodigit Addition Word Problems
2.NBT7 Add
and subtract within 1000, 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. Understand that in adding or subtracting threedigit
numbers, one adds or subtracts hundreds and hundreds, tens and tens,
ones and ones; and sometimes it is necessary to compose or decompose
tens or hundreds.
Possible Activities: 
Base Ten Buildings 
2.NBT8 Mentally add 10 or 100 to a given number 100900 and mentally subtract 10 or 100 from a given number 100900.
Possible Activities: 
Race Around (+10) Ver.2 
2.NBT9 Explain why addition and subtraction strategies work, using place value and the properties of operations.
Possible Activities:
Finding Sums