Question

My empty school bag weighs $1kg325g$. I put $2kg450g$ of books in it. How much does the bag weigh now in $kg$?

Answer 1

Weight of empty bag $=1kg325g=$

Weight of books $=2kg450g$

Weight of bag with books $=1kg325g+2kg450g$

$=3kg775g$

We know

$1kg=1000g$

$1g=\frac{1}{1000}$

So,

Weight of bag with books $=3+\frac{775}{1000}$

$=3.775kg$