Respuesta :

Answer:

Assuming that the last four numbers are answer choices, your answer would be 11

Step-by-step explanation:

9/11 rounds up to 1, 1 + 18 = 19

3/8 rounds down, so you only have 8 for that one

19 - 8 = 11

Answer:

Option (b) = 11 for  difference between [tex]18 \frac{9}{11}[/tex] and [tex]8 \frac{3}{8}[/tex]

Explanation:  

For rounding off each mixed number to the nearest whole number.

In this,   [tex]18 \frac{9}{11}[/tex] is rounded off to the nearest whole number 19

[tex]18 \frac{9}{11}=19[/tex]

and [tex]8 \frac{3}{8}[/tex] was rounded off to the nearest whole number 8

[tex]8 \frac{3}{8}=8[/tex]

[tex]18 \frac{9}{11}-8 \frac{3}{8}[/tex]   = 19-8 = 11.  

and the estimated difference was found to be 11