Arithmetic Grade Four

Lesson Forty-seven: Column Multiplication

Inspect this multiplication problem: 

    222
    x 7 
   -----
Adding another digit to the top number means more steps. Not only must we carry from the ones to the tens, but now we must also carry from the tens to the hundreds! 

 CARRY TO TENS		CARRY TO HUNDREDS	FINAL ANSWER
     1			   11			  11
    222			   222			  222
    x 7 		   x 7	                  x 7
   -----		  -----			 -----
      4			    54			 1554

Here are a few more examples for you to study: 


        22                       11			 53
	777			 312 			 364
	x 3			 x 9			 x 8
       -----			-----			-----
       2331			2808			2912
Now you will try a few of these yourself.

Click here to go to next page