Question

What is a reasonable estimate for 1 3/4+ 1 1/4+ 1/16

Answer 1

$1\frac{3}{4}$ + $\frac{11}{4}$ + $\frac{1}{16}$
1st step: Change the mixed fractions to improper fractions:
              $1\frac{3}{4}$ = $\frac{7}{4}$
2nd step: Find a common denominator 
               16 is the common denominator
 $\frac{7*4}{4*4}$ + $\frac{11*4}{4*4}$ + $\frac{1}{16}$
=$\frac{28+44+1}{16}$
=$\frac{73}{16}$
As a mixed fraction:
=$4\frac{9}{16}$

Answer 2

13/4 rounds to about 3, 11/4 rounds to 3, and 1/16 rounds to 0. So a resonable estimate would be about 6.