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.