$var1.part1/ns0:number
$var2.part1/ns0:number
$var1.part1/ns0:numberWithZeroFraction
$var2.part1/ns0:numberWithZeroFraction
$var1.part1/ns0:numberWithFraction
$var2.part1/ns0:numberWithFraction
( $var1.part1/ns0:number + 1 )
$var2.part1/ns0:numberAddition
( $var1.part1/ns0:numberWithZeroFraction + 1 )
$var2.part1/ns0:numberWithZeroFractionAddition
( $var1.part1/ns0:numberWithFraction + 0.5 )
$var2.part1/ns0:numberWithFractionAddition