# Number Talks Teaching Resource Pack – Grade 2

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A collection of number talks teaching resources that support meaningful and highly engaging conversations in the mathematics classroom.

Number talks are a daily, math activity that allow students to have meaningful and highly engaging conversations about mathematics. Incorporating these short, ten-minute daily exercises into your classroom routine not only help students develop mental math and flexible thinking about numbers and operations, but also provide opportunities for them to investigate and apply mathematical connections and relationships.

This teaching resource pack supports number talks in the classroom with a range of task cards, a set of hand signal posters, and sentence starters for students to use in their conversations.

This teaching resource pack includes:

- Number Talks – Place Value Task Cards
- Number Talks – Near, Far, and in Between Task Cards
- Number Talks – Making Numbers Task Cards
- Number Talks – How Many Task Cards
- Number Talks – Fluency to 20 Task Cards
- Number Talks – Double Digit Addition Task Cards
- Number Talks – Double Digit Subtraction Task Cards
- Number Talks – Sentence Starters Poster Pack
- Number Talks – Hand Signal Poster Pack

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#### Common Core State Standards alignment

Grade 2 > Standards for Mathematical Practice > Operations & Algebraic Thinking > Add and subtract within 20 > **CCSS.MATH.CONTENT.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.

Grade 2 > Standards for Mathematical Practice > Operations & Algebraic Thinking > Work with equal groups of objects to gain foundations for multiplication > **CCSS.MATH.CONTENT.2.OA.C.4**

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.

Grade 2 > Standards for Mathematical Practice > Number & Operations in Base Ten > Understand place value > **CCSS.MATH.CONTENT.2.NBT.A.1**

Understand that the three digits of a three-digit number represent amounts of hundreds, tens, and ones; e.g., 706 equals 7 hundreds, 0 tens, and 6 ones. Understand the following as special cases:

Grade 2 > Standards for Mathematical Practice > Number & Operations in Base Ten > Understand place value > CCSS.MATH.CONTENT.2.NBT.A.1 > **CCSS.MATH.CONTENT.2.NBT.A.1.A**

100 can be thought of as a bundle of ten tens — called a "hundred."

Grade 2 > Standards for Mathematical Practice > Number & Operations in Base Ten > Understand place value > CCSS.MATH.CONTENT.2.NBT.A.1 > **CCSS.MATH.CONTENT.2.NBT.A.1.B**

The numbers 100, 200, 300, 400, 500, 600, 700, 800, 900 refer to one, two, three, four, five, six, seven, eight, or nine hundreds (and 0 tens and 0 ones).

Grade 2 > Standards for Mathematical Practice > Number & Operations in Base Ten > Understand place value > **CCSS.MATH.CONTENT.2.NBT.A.3**

Read and write numbers to 1000 using base-ten numerals, number names, and expanded form.

Grade 2 > Standards for Mathematical Practice > Number & Operations in Base Ten > Understand place value > **CCSS.MATH.CONTENT.2.NBT.A.4**

Compare two three-digit numbers based on meanings of the hundreds, tens, and ones digits, using >, =, and < symbols to record the results of comparisons.

Grade 2 > Standards for Mathematical Practice > Number & Operations in Base Ten > Use place value understanding and properties of operations to add and subtract > **CCSS.MATH.CONTENT.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.

Grade 2 > Standards for Mathematical Practice > Number & Operations in Base Ten > Use place value understanding and properties of operations to add and subtract > **CCSS.MATH.CONTENT.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.

Grade 2 > Standards for Mathematical Practice > Number & Operations in Base Ten > Use place value understanding and properties of operations to add and subtract > **CCSS.MATH.CONTENT.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.

Grade 2 > Standards for Mathematical Practice > Number & Operations in Base Ten > Use place value understanding and properties of operations to add and subtract > **CCSS.MATH.CONTENT.2.NBT.B.9**

Explain why addition and subtraction strategies work, using place value and the properties of operations.

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