This page provides sample Number activities from our 1st Grade Math Centers eBook. Try out the sample activities under each Common Core Standard or download the eBook and have all the Number, Geometry, Measurement and
Data Centers you’ll need for the entire school year in one convenient
digital file.

Teaching in a state that is implementing their own specific math standards? Download our 1st Grade Correlations document for cross-referenced tables outlining the alignment of each state's standards with the CCSS-M, as well as the page numbers in our 1st Grade Math Centers eBook related to each standard.

**1.OA.A.1** Use addition and subtraction within 20 to solve 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:**

Math Literature Link: Anno's Counting House

Math Literature Link: Two of Everything

Math Literature Link: Ten Flashing Fireflies

Add To: Start Unknown

Take From: Result Unknown Word Problems

Take From: Start Unknown Word Problems

Put Together/Take Apart: Total Unknown Word Problems

Put Together/Take Apart: Both Addends Unknown Word Problems

Put Together/Take Apart: Addend Unknown Word Problems

Compare: Difference Unknown Word Problems

Compare: Bigger Unknown Word Problems

Compare: Smaller Unknown Word Problems

Mixed Addition/Subtraction Word Problems

**1.OA.A.2 ****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.**

Three Addends Word Problems

Three Addends Unknown

Find 3 Cards

**1.OA.B.3** 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 of addition). 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 of addition).**Sample Activities:****Turn Around Trains****Turn Around Dominoes****Also included in**** 1st Grade Math Centers:**

Domino Related Facts

Three Addends**1.OA.B.4 **Understand subtraction as an unknown-addend problem. For example, subtract 10-8 by finding the number that makes 10 when added to 8.**Sample Activity:**

Subtract from Ten**Also included in 1st Grade Math Centers:****Ten Frame SubtractionThink Addition for Subtraction (v. 1-4)**

**1.OA.C.5** Relate counting to addition and subtraction (e.g. by counting on 2 to add 2).**Sample Activities:**

Show One More

Show One Less**Also included in ****1st Grade Math Centers:**

Show One More/One Less**1.OA.C.6** 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).**Sample Activities:**

Count On One (v. 2)

Find Ten

Make Ten

Doubles Path

Near Doubles Path

Domino Addition

Part-Part Whole Cards

**1.OA.D.7 **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**Sample Activity:**

True or False?**Also included in 1st Grade Math Centers:**

Equal Sums**1.OA.D.8** 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 = □**Sample Activity:**

Find the Missing Number

**1.NBT.A.1** 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.**Sample Activities:**Base Ten Path

Counting Collections (v. 1-2)

Ten Frame Path

Counting Cards (Set 3)

Estimate and Count

**Understand place value****1.NBT.B.2** 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).**Sample Activities:**

Tens and Ones with Snap Cubes**Build a Train **

Make Ten Bundles

My Double Ten-Frame Riddle

Comparing Two-Digit Numbers

Greater Than 50

Ten Frame Compare

Scoop It

Who Has the Greater Sum? (v. 1)

**1.NBT.C.4 **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.**Sample Activities:****Sums of 90 **

Adding Tens to a 2-Digit Number

Add Ten on the Number Line

What Number is ...?

Adding a Multiple of 10 (ver. 1)

Ten More

Race Around -10 (v.1)

Subtract Ten

Subtract Multiples of Ten

**ADDITIONAL RESOURCES**Identify, continue and label patterns. Create patterns using number, shape, or

Number Patterns

Also included in 1st Grade Math Centers:

Pattern Cards

Growing Patterns

Make a Pattern