Asked by dk
                without multiplying, how do you know that the product of 399 and 48 is smaller than 20,722?
            
            
        Answers
                    Answered by
            bobpursley
            
    what is 50x400?
    
                    Answered by
            dk
            
    20,000
    
                    Answered by
            Ms. Sue
            
    Since 399 is less than 400 and 48 is less than 50, then obviously the answer must be less than 20,000.  Right?
    
                    Answered by
            christina   manley
            
    the    world    in   the   1400s
 
    
                    Answered by
            Juan
            
    how can you show without multiplying that 4/9 is greater then 0.4
    
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