**2nd Grade Numbers of the Week**

(Use for morning work or as homework)**Represent and solve problems involving addition and subtraction ****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)**Math Read Aloud Task Cards:**One Hunter

P. Bear's New Year's Party

The Napping House

Two of Everything

Word Problems (within 100):

Add to: Change Unknown

Take From: Start Unknown

Put Together/Take Apart: Total Unknown

Compare: Difference Unknown

Compare: Bigger Unknown

Compare: Smaller Unknown

Mixed Addition/Subtraction Two Step

of two one-digit numbers.

Making Ten (ver. 1)

Four in a Row Subtraction

Part Part Whole Cards

11 More

Magic Squares

Sum Search

Doubles Memory

Making Ten (v. 2 & 3)

Make a Ten Path (v. 1)

Four in a Row Subtraction

Near 20

Even Odd Scoop

to 5 columns; write an equation to express the total as a

sum of equal addends.

Roll a Rectangular Array

Making Different Sized Squares

Making Rectangular Arrays

Array Cards

Array Match

**Understand place value****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:Make Ten Bundles**Base 10 Concentration (v.2)

Race to 100

Race to Zero

Counting Collections

Count by Fives (v. 4)

Two Ways to Count to Ten

Count by Tens (v. 1- 4)

Skip Counting Cards

My 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)

**Use place value understanding and properties of operations to add and subtract****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 Digit Addition Trains (v. 1 & 2)

Doubles Plus One (v. 2)

Doubles Plus Two (v. 2)

Doubles Minus One (v. 2)

Doubles Minus Two (v. 2)

Four in a Row with Near Doubles

Make a Ten Cover Up (v. 2)

Make a Ten Path (v. 2)

Make 100

Add Four Addends

Three 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:**

Strategies (20 Task Cards)