OA.4.9

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.

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Formative Assessments
Formative Assessments
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Students are asked to consider what type of number results when adding two odd numbers and when adding three odd numbers.
Adding Odd Numbers
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Students are asked to determine if the total number of students in five classes will be even or odd.
Multiplication of Even Numbers
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Students are asked to consider the parity of the sums of two even numbers, two odd numbers, and an even and an odd.
Adding Odd and Evens
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Students are asked to find the missing numbers in a column of a multiplication table by using a pattern found within the table.
Patterns Within the Multiplication Table
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Students are presented with an equation and asked to find a pattern within the equation and to determine if the equation is true or not.
Decomposing Into Equal Addends
Virtual/Hands-on Manipulatives
Virtual/Hands-on Manipulatives
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CPALMS: This versatile interactive applet helps students learn to skip count, practice multiplication facts, and discover number patterns. Users select the number to count by and the starting number.
Hundreds Chart
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HMH: Students can use either an addition or multiplication chart to see patterns and explain them using properties of operations.
Use A Multiplication Chart
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CPALMS:A versatile tool that can be used to illustrate the operations of addition, subtraction, multiplication, and division.
Number Line Bars
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CPALMS:This Flash applet generates number fact questions for the game of Bingo.
Number Facts Bingo
Assessment Questions
Assessment Questions
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Multiple Choice
Videos of Expert Instruction
Videos of Expert Instruction
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Guess how many pushups Bucky had to do over the entire game.
Bucky the Badger

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Use Real Link and Title
Hook/Performance Tasks
Hook/Performance Tasks
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The purpose of the task is to study some patterns in a small addition table.
IM:  Addition Patterns
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The goal of this task is for students to look for structure and identify patterns and then try to find the mathematical explanation for this.
IM:  Patterns in the Multiplication Table
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The goal of this task is to help students understand the commutative property of addition by examining the addition facts for single digit numbers.
IM:  Symmetry of the Addition Table
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This task builds on 2.OA.2 where students study more carefully the make a ten strategy that they should already know and use intuitively.
IM:  Making a Ten