### Number Systems

goals
Reduce the fractions $\dfrac{348}{319},\ \dfrac{221}{247},\ \dfrac{437}{551}$ to the lowest terms.
Arrange the following decimals in ascending order.
$2.165, 2.018, 2.2, 2.61$
$4.03, 4.30, 4.308, 4.380$
Evaluate $19 \div (31)$  =
Find the difference between $3.25$ and $9.86$
If $x =2\sqrt{3} + 2\sqrt{2}$, find :