This page provides samples of 2nd grade number activities suitable for use in math centers, small group, or whole class settings. All activities are designed to elicit a range of responses and provide opportunities for students to communicate their reasoning and mathematical thinking. Download the sample activities under each standard or purchase the 2nd Grade Math Centers eBook and have all the Number, Geometry, Measurement and Data Centers you’ll need for the entire school year in one convenient digital file.

**2nd Grade Numbers of the Week** (Use for morning work or as homework)

**2.OA.A.1** 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.**Sample Activities:**Add To: Result Unknown (within 100)

Take From: Result Unknown (within 100)

**2.OA.B.2 **Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.**Sample Activities:**

**2.OA.C.3 **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.**Sample Activities:**

Even Odd Scoop**Math Read Aloud Task Cards:**

Roll a Rectangular Array

Making Different Sized Squares

Making Rectangular Arrays

Array Cards

Array Match

**2.NBT.A.1 **Understand that the three digits of a three-digit 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).**Sample Activities:**

**2.NBT.A.2 **Count within 1000; skip count by 5s,10s, and 100s.**Sample Activities:**

Counting Collections

Count by Fives (v. 4)**Math Read Aloud Task Card:**

Two Ways to Count to Ten**Also included in**** ****2nd Grade Math Centers:****Count by Fives (v. 1-3)Count by Tens (v. 1- 4)Skip Counting CardsMy Skip Counting Patterns Book**

**2.NBT.A.3 **Read and write numbers to 1000 using base-ten notation, number names, and expanded form.**Sample Activities:**

Make Six Numbers

Roll 3 Digits

Numeral Writing Barrier Game**Also included in **2nd Grade Math Centers:**Number Word Concentration**

**2.NBT.A.4 **Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols.**Sample Activities:**Comparing 3 Digit Numbers

Place Value Challenge (v. 1)

**2.NBT.B.5** Fluently add and subtract within 100 using strategies based on place value, properties of operations, and/or the relationship between addition and subtraction.**Sample Activities:**Keep on Doubling

2-Digit Addition Split

**2.NBT.B.6 **Add up to four two-digit numbers using strategies based on place value and properties of operations.**Sample Activity**:

Make 100**Also included in ****2nd Grade Math Centers:****Add Three AddendsAdd Four AddendsThree Addend Word Problems**

**2.NBT.B.7 **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 three-digit 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.**Sample Activities:**Base Ten Bag: Addition

Base Ten Pictures

3-Digit Addition Split

Base Ten Bag: Subtraction

Make a Ten Path (v. 3)

**2.NBT.B.8 Mentally add 10 or 100 to a given number 100-900 and mentally subtract 10 or 100 from a given number 100-900.Sample Activities:**