פתרו את התרגילים הבאים:

${\displaystyle 2/7+6/7=}$
${\displaystyle 7/2+4/2=}$
${\displaystyle 3/5+6/5=}$
${\displaystyle 2/3+8/3=}$
${\displaystyle 6/8+5/8=}$
${\displaystyle 9/5-3/5=}$
${\displaystyle 7/4-9/4=}$
${\displaystyle 7/9-5/9=}$
${\displaystyle 7/6-5/6=}$
${\displaystyle 7/2-8/2=}$