Arithmetic Grade Three

Lesson One hundred and nineteen: Three Column Regrouping


Here's another example:

	  228
	  x 4
	--------
	
  STEP ONE: multiply bottom number by ones digit of top number.

       8 x 4 = 32

  STEP TWO: carry and bring down.
        
        3
       228
       x 4 
      -----
         2

  STEP THREE: multiply bottom number by tens digit and add carried number.

       4 x 2 + 3 = 11

  STEP FOUR: carry and bring down.

       13
       228
       x 4 
      -----
        12

  STEP FIVE: multiply bottom number by hundreds digit and add carried number.

      2 x 4 + 1 = 9

  STEP SIX: bring down.

       13
       228
       x 4 
      -----
       912

Do these on a sheet of paper before going on to the activity:

	  356			  254		  124
	  x 2			  x 5		  x 6
	-------			-------		--------


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