Application Project- Odd and Even Numbers

Application Project- Odd and Even Numbers

2.OA.3

Learning Objectives:

By the end of this lesson you will be able to say:

“I can use strategies to determine if a set of objects have an odd or even number of members.”

2.OA.3

Lesson 1: Skip Counting

• Start with the number 2

• Add 2 more to get to 4

• Add 2 more to the number 4 to get to 6

• Add 2 more to the number 6 to get to 8

• Add 2 more to the number 8 to get to 10

• When skip counting by two the pattern is

  2, 4, 6, 8, 10, and so on.

Multiple Choice

Are these circles paired together correctly?

• Yes

• No

Open Ended

How many smiley faces do you see? Use skip counting to help you.

Multiple Choice

Skip count by twos. How many circles are there altogether?

• 4

• 16

• 8

• 10

Multiple Choice

How many pairs of squares are there?

• 14

• 12

• 8

• 7

Multiple Choice

How many total squares are there? Use skip counting to help you determine the number of squares.

• 7

• 14

• 12

• 10

Equal Groups

• Equal groups are groups that have the same number of objects. 

• Placing objects in equal groups will determine if the total number of objects is odd or even.

• If the groups have the same or an equal number of objects the number of total objects is even.

• If the two groups have an unequal number of objects the number of total objects is odd.

Multiple Choice

Is there an equal or unequal number of cookies in each jar?

• equal

• unequal

Multiple Choice

Since we know that there is an unequal total amount of cookies, we know that there is an _______ number of cookies.

• odd

• even

Multiple Choice

Look at the picture and select the correct answer.

• There are 2 equal groups of 4 cookies

• There are 5 equal groups of 2 cookies

• There are 2 equal groups of 5 cookies

Open Ended

Using skip counting and equal groups, tell how many cookies are in the jar.

Open Ended

Tell why there is an odd or even number of cookies in the jar.

Even Sums and Equal Addends

• After the equal groups have been made, use the amount in each group to make addends and sums.

• An addend is a number that is added to another number to create a sum.

• A sum is an answer to an addition equation.

• even + even = even

• even + odd = odd

Multiple Choice

Since there is an equal amount of apples on each tree, we know that there is an ______ number of apples.

• even

• odd

Multiple Choice

What equation would be the best choice to represent the apples on the tree?

• 7+7

• 16+0

• 9+9

• 8+8

Open Ended

Are there an odd or even total number of apples on both trees?

What equation would you write to prove your answer?

Multiple Choice

What equation matches the sets of apples in the picture? Is there an odd or even total number of apples?

• 6+6, even

• 7+7, even

• 7+6, odd

• 8+6, odd

Multiple Choice

What equation matches this set of apples?

• 7+7

• 6+6

• 10+6

• 8+8

Quick reminders:

• Determine if the sets are equal or unequal.

• If both groups are equal, there are an even number of members.

• If the groups are unequal, there are an odd number of members.

• Write an equation to represent the amount of members in both groups.

• If the addends are the same, the number is even. If the addends are different, the number is odd.

Closing note

I hope that you have gained new information on odd and even numbers. Continue to practice using new strategies to determine if a number is odd or even. Happy learning!