# Four's

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## Objective

Students will be able to fluently multiply with 4's.

#### Big Idea

Double the Doubles!

## Concept

15 minutes

Do you the students know their 2's facts?  Well, if they do, 4's will be somewhat easy.

Multiplying by 4 is essentially doubling a double.  For example, 4 x 3 is really like 3 + 3 and 3 + 3 or 3 x 2 and 3 x 2.  What you're left with is 6 + 6 which is another double fact.

Although these simple relationships between factors are somewhat simple for educators to identify, students don't always make the connection and struggle with understanding.

I have included a short video for multiplying by 4.  This is meant to be more of a review and practice instead of a concept introduction.

## Practice

30 minutes

Spinner Tool

Students are given one of the spinners to fill out as a reference tool.  The tool will be primarily used during the current level of the multiplication program but should be kept as a reference going forward to higher levels.

Flashcards

There is a set of flashcards provided for the current level.  Each set of flashcards include the facts with their turn-around facts.  It is important that the students are comfortable with the commutative property of multiplication.

Games for Practice

Jumbo Tic-Tac-Toe

• Each player chooses one factor (2-12)
• Record the factor in the top of second column
• Toss 2 dice and find the sum
• Multiply the sum by the factor
• Record the product next to the sum in the table
• If the sum has already been filled, lose a turn
• First player to complete the table wins

Line It Up

• Toss 2 dice and find the sum
• Multiply the sum by 2
• Place a counter on the product
• If the product has a counter on it, lose a turn
• First player to build a full row or column wins

Face-Off

• Each player chooses one factor (2-12)
• Record the factor in the top of second column
• Toss 2 dice and find the sum
• Multiply the sum by the factor
• Record the product next to the sum in the table
• If the sum has already been filled, lose a turn
• First player to complete the table wins

## Timed Test

15 minutes

There are two timed tests associated with this new factor.  The first timed test is designed to be a one minute test of 40 problems and includes only multiplication facts with the new factor.  The second timed test is designed to be a two minute test of 60 problems and includes all multiplication facts learned in the leveled program thus far.