6th Grade Math Textbook, Progress

Update your skills. See page 9.

Multiply Whole Numbers

2-3

Estimate the product by rounding. Then multiply.

1. 
   
   
   
   2. 
      
      
      
      3. 
         
         
         
         4. 
            
            
            
            5. 
               
               
               
               6. 6549
                  
                  302
               
               
               
               
            
            
            
            
         
         
         
         
      
      
      
      
   
   
   
   

2365


 580

385


 806

817


 609

593


 506

237


 380

Align partial

products by

place value.

Think

230,640 is close to the estimate of 240,000.

When multiplying by a number with a zero, you

may save a step by omitting a partial product.

Multiply: 620
 372 n

First estimate by rounding: 600
 400 240,000

Then multiply 620
372.

Long Way Short Way

0 00,3 7 2 0 00,3 7 2

0 0,
6 2 0 0 0,
6 2 0

0 00,0 0 0 0 
 372 Omit this 0 07,4 4 0

0 0 7 ,4 4 0 20 
 372 partial 2 2 3,2

2 2 3, 2 0 0 600 
 372 product. 2 30,64 0

2 30,64 0

The product is 230,640.

Change the order of the factors

to check your answer.

You may use the Distributive Property to

help find products of larger numbers.

902 
41,736(9002)
41,736

(900
41,736)(2
41,736)

37,562,40083,472

37,645,872

6 2 0


3 7 2

1 2 4 0

4 3 4 0 0

1 8 6 0 0 0

2 30,64 0

Remember: You

do not need to

multiply by 0 tens.

2.3

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