3rd Grade Number Activities

This page provides examples of 3rd 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 provide opportunities for students to communicate their reasoning and mathematical thinking.All files for the 3rd Grade Number Activities listed are in PDF format and can be accessed using Adobe Reader.


Represent and solve problems involving multiplication and division
3.OA.1 Interpret products of whole numbers, e.g. interpret 5 x 7 as the total number of objects in 5 groups of 7 objects each. For example, describe a context in which a total number of objects can be expressed as 5 x 7.
Possible Activities:
Equal Groups
Relate Addition and Multiplication
Building Arrays
Array Picture Cards

3.OA.2 Interpret whole-number quotients of whole numbers, e.g. interpret 56÷8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each. For example, describe a context in which a number of shares or a number of groups can be expressed as 56 ÷ 8.
Possible Activities:
Sharing or Grouping?

3.OA.3 Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g. by using drawings and equations with a symbol for the unknown number to represent the problem.

Possible Activities:
Number Story Arrays (Set 1)
Number Story Arrays (Set 2)
Multiplication Word Problems
Equal Rows in a Marching Band
Sharing Marbles

Math Read Aloud Task Cards:
One Hundred Hungry Ants
Six Dinner Sid
Amanda Bean's Amazing Dream
The Doorbell Rang
Each Orange Had 8 Slices

Good teaching is more a giving of right questions than a giving of right answers.

            ~ Josef Albers

3rd Grade Number Read-Alouds

Multiplication Read Alouds
Multiplication Read Aloud
Multiplication Read Aloud
Multiplication Read Aloud
Division Read Aloud

3.OA.4 Determine the unknown whole number in a multiplication or division equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 x?=48, 5 = ?÷3, 6x6 =?
Possible Activities:

Missing Numbers: Multiplication
Missing Numbers: Division

Understand properties of multiplication and the relationship between multiplication and division
3.OA.5 Apply properties of operations as strategies to multiply and divide. Examples: If 6x4=24 is known then 4x6=24 is also known (Commutative property of multiplication.) 3x5x2 can be found by 3x5=15, then 15x2=30, or by 5x2=10, then 3x10=30 (Associative property of multiplication). Knowing that 8x5=40 and 8x2=16, one can find 8x7 as 8 x (5+2) = (8x5) + (8x2) = 40 +16 =56 (Distributive property).
Possible Activities:
Turn Your Array
Decompose a Factor (ver. 1)
Decompose a Factor (ver. 2)

3.OA.6 Understand division as an unknown-factor problem. For example, find 32 ÷ 8 by finding the number that makes 32 when
multiplied by 8.
Possible Activities:
Division as Unknown Factor Problems
Multiplication/Division Number Stories

Multiply and divide within 100
3.OA.7 Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g., knowing that 8x5=40, one knows 40÷5=8) or properties of operations. By the end of Grade 3, know from memory all products of two one-digit numbers.

Solve problems involving the four operations, and identify and explain patterns in arithmetic
3.OA.8 Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.

Possible Activities:
Two-Step Word Problems Set 1
Two-Step Word Problems Set 2

3.OA.9 Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations. For example, observe that 4 times a number is always even, and explain why 4 times a number can be decomposed into two equal addends.


Use place value understanding and properties of operations to perform multi-digit arithmetic
3.NBT.1 Use place value understanding to round whole numbers to the nearest 10 or 100.

Possible Activities:
Round to the Nearest Ten
Round to the Nearest Hundred
What's the Nearest Ten?
What's the Nearest Hundred?
Round Up or Down?

Count by 10s and 100s Number Lines
Estimating Sums (ver. 1)
Estimating Sums (ver. 2)
Estimating Differences (ver. 1)
Estimating Differences (ver. 2)

3.NBT.2 Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
Possible Activities:
Close to Zero ver. 2
3 Digit Addition Split
Doubling to 1000
Add the Difference

3.NBT.3 Multiply one-digit whole numbers by multiples of 10 in the range 10-90 (e.g., 9x80, 5x60) using strategies based on place value and properties of operations.
Possible Activities:

Multiples of Ten Multiply
Multiply by Multiples of 10 Problems


Develop understanding of fractions as numbers
3.NF.1 Understand a fraction 1/b as a quantity formed by 1 part when a whole is portioned into b equal parts: understand a fraction a/b as the quantity formed by a parts of size 1/b.

3.NF.2 Understand a fraction as a number on the number line; represent fractions on a number line diagram. a. Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole and portioning it into b equal parts. Recognize that each part has size 1/b and that the endpoint of the part based at 0 locates the number 1/b on the number line.
Possible Activities:
Fraction Strips
Make Your Own Fraction Strips
Number Line Roll

b. Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0. Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line.
Possible Activities:

Fraction Number Lines

3.NF.3 Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size. a. Understand two fractions as equivalent (equal) if they are the same size, or the same point on a number line.
Possible Activities:
Pizza for Dinner
Build a Hexagon

b. Recognize and generate simple equivalent fractions e.g.., ½ = 2/4, 4/6=2/3) Explain why the fractions are equivalent, by using a visual model.
Possible Activities:
Exploring Equivalent Fractions
Creating Equivalent Fractions
Cuisenaire Equivalent Fractions

c. Express whole numbers as fractions, and recognize fractions that are equivalent to whole numbers. Examples: Express 3 in the form 3=3/1; recognize that 6/1 = 6; locate 4/4 and 1 at the same point of a number line diagram
Make ONE 

d. Compare two fractions with the same numerator or the same denominator by reasoning about their size. Recognize that comparisons are valid only when the two fractions refer to the same whole. Record the results of comparisons with the symbols >, =, or < and justify the conclusions, e.g., by using a visual fraction model.
Possible Activities:
Who Ate More?
Compare and Order

More 3rd Grade Number Resources

Return to Home Page