Understanding Even and Odd Numbers

This video tutorial guides second-graders through Math Module Six, focusing on arrays, odd and even numbers, and repeated addition. It explains how arrays are formed using rows and columns, and how to identify odd and even numbers by their last digit or by pairing objects. The tutorial includes examples of counting dots and creating star arrays, as well as drawing rectangles with tiles. Students learn to complete arrays and write repeated addition sentences, reinforcing their understanding of the concepts. The video concludes with a final example and encourages students to apply these strategies in their assessments.

What is the main focus of Math Module Six?

• Subtraction

• Geometry

• Arrays

• Fractions

How are arrays structured?

• In lines

• In circles

• In rows and columns

• In triangles

What makes a number odd?

• It ends in 0, 2, 4, 6, or 8

• It is a prime number

• It ends in 1, 3, 5, 7, or 9

• It is divisible by 2

How can you determine if a number is even using pictures?

• Count the total number of pictures

• Pair up the pictures and see if any are left over

• Add all the pictures together

• Arrange pictures in a circle

In the example with 15 red dots, why is the number considered odd?

• Because 15 ends in 5

• Because 15 is a multiple of 3

• Because 15 is a prime number

• Because 15 is less than 20

What is the repeated addition sentence for four rows of two?

• 1 + 1 + 1 + 1

• 2 + 4 + 6 + 8

• 4 + 4 + 4

• 2 + 2 + 2 + 2

How many tiles are used to draw a rectangle with three rows?

• 6 tiles

• 9 tiles

• 12 tiles

• 15 tiles

What is the repeated addition sentence for three rows of four tiles?

• 3 + 3 + 3

• 4 + 4 + 4

• 2 + 2 + 2

• 5 + 5 + 5

What shape must an array be to be considered complete?

• Rectangle or square

• Triangle

• Hexagon

• Circle

How many smiley faces are in two groups of four?

• 6

• 8

• 10

• 12