Arithmetic Grade Four

Lesson Forty-eight: Column Multiplication

Inspect this multiplication problem: 

   2222
    x 7 
   -----
Adding another digit to the top number means more steps. Not only must we carry from the ones to the tens and the tens to the hundreds, but now we have to carry from the hundreds to the thousands too! 

 CARRY TO 10s	CARRY TO 100s    CARRY TO 1000s    FINAL ANSWER
     1		    11		    111		     111
   2222		   2222	            2222	     2222
    x 7 	    x 7	             x 7              x 7
  ------	  ------           ------           ------
      4		     54		     554            15554

Here are a few more examples for you to study: 


       222                      211			253
       5777			2312 			3364
	x 3			 x 9			 x 8
       -----			-----			-----
      17331		       20808		       26912
Now you will try a few of these yourself.

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