Skip counting Let’s skip count by 3s to 30. 3 6 9 12 15 18 21 24 27 30.

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Presentation transcript:

Skip counting Let’s skip count by 3s to

Skip counting Let’s skip count by 6s to

Skip counting Let’s skip count by 7s to

Skip counting Let’s skip count by 8s to

Skip counting Let’s skip count by 9s to

Find the Unknown Factor 6 x _____ = 12 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 4 x _____ = 12 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 3 x _____ = 12 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 3 x _____ = 24 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 4 x _____ = 24 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 8 x _____ = 24 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 6 x _____ = 36 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 4 x _____ = 36 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 9 x _____ = 36 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 9 x _____ = 72 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 8 x _____ = 72 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 8 x _____ = 48 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Unknown Factor 2 x _____ = 24 FIND THE UNKNOWN FACTOR AND SAY THE EQUATION.

Find the Area On your white boards write An expression that we could Use to solve the area of the SHADED rectangle. On your white boards write An expression that we could Use to solve the area of the UNSHADED rectangle. (3 x 5) (3 x 3) HOW CAN WE USE THESE EXPRESSIONS TO FIND THE AREA OF THE LARGE RECTANGLE? ADD THEM!! SO WHAT IS THE AREA? = 24 sq. units

Find the Area On your white boards write An expression that we could Use to solve the area of the SHADED rectangle. On your white boards write An expression that we could Use to solve the area of the UNSHADED rectangle. (3 x 10) (3 x 7) HOW CAN WE USE THESE EXPRESSIONS TO FIND THE AREA OF THE LARGE RECTANGLE? ADD THEM!! SO WHAT IS THE AREA? = 51 sq. units

Problem of the Day

Concept Development Write an expression to show how to find the area of the rectangle. 3 x 12 In the problem of the day you found what 3 x 12 equals… 36 square units!

3 x (2 x 6) Why is this expression equal to the one you just wrote? Write this expression on your white boards with the parentheses in a different place. When I put my hands in the air show me your boards. (3 x 2) x 6

SOLVE 3 x 2 and then write the new expression on your boards. 6 x 6 What new possible side lengths did we find for a rectangle with an area of 36 square units? 6 and 6

Let’s look at our expression, (3 x 2) x 6 again. Use the commutative property and switch the order of the factors in the parentheses. Will you be able to find new side lengths by moving the parentheses?

How is 3 x (3 x 4) equal to our original expression of 3 x 12? WRITE THIS EXPRESSION WITH THE PARENTHESES IN A DIFFERENT PLACE. AT MY SIGNAL (dog picture), SHOW ME YOUR BOARD. (3 x 3) x 4 What new side lengths did we find for a rectangle with an area of 36 sq. Units? 9 and 4

Do we have a side length of 1? A side length of 2?of 4?

WHY NOT? NOW DO YOU THINK WE FOUND ALL THE POSSIBLE SIDE LENGTHS?

PROBLEM SET