898 mm because 8.98 is a lot smaller, it's only in the ones place.
        
                    
             
        
        
        
Answer:
70
Step-by-step explanation:
First add the tens: 20 + 30 + 10= 60
Now add the Ones: 7 + 2 + 4= 13
now add them all together: 60+13=73
so the best estimate is 70
                                          Your Welcome
 
        
                    
             
        
        
        
Answer:
6.6a+6b-7.1
Step-by-step explanation:

 
        
             
        
        
        
1) -(5.8x14) = -406/5 = -81.2
2) (-1/3)(-1) = 1/3 = 0.3333333....
3) -2 + 1/4 / 1 + 1/2
-7/4 / 3/2
-1.75 / 1.5 = -7/6 = -1.166....7
What do you mean by “and”?????
Is it divided or add??
I’m only sure about the first one but tell me what and mean