Question 9888
 
first answer all the ?s the why they are..

1)  1,000-160

    I like to do it vertical
     
     1000
   -  160
_____________
      840

to check think does 840+160=1000
 yes it does so thats right

2)  (160)/(1+160)

      160        160
   ________  =  _____
    (1+160)      161
that cant be reduced so that is yor answer

now..u try to do the last one by yourself

then you have to find out if the value would be greater with 160 or 120 so you replace all the 160s for 120s

1.) 1,000-120
2.) (120)/(1+120)
you do the 3rd

now work those problems

 1,000
-  120
_______
   880

again cheak by adding 880 and 120... and it does = 1000 
so its right

next...

(120)/(1+120)
   120       120
  _____   = _____
  1+120      121

and that will not reduce so thats your answer

yes do # 3 now..

now you take both the values and see what one is bigger


on number 1       840   and    880
the 2nd 1 is bigger so the 1st one's value is greater with 120 instead of 160

on number 2       160            120      
                 _____    and  _______                     
                  161            121                                

on this one to find out which one is bigger you need a common denominator. Lets use...one i know will work 
161 x 121 = 19481

     19360                19320                  
_______________  and  ________________

     19481                19481                                            

so now you see that 160
                   _____
                    161   is greater 


does that answer your question 

good luck on # 3