The symbol for iffinity is a capital O with an addition sign
in it: [symmetry].
One of the children said, "You could have said it was two-fourths." The teacher summed up this discussion by saying, "Any of these are correct because the bean does measure one-half worm, the bean does measure one-fourth plus one-fourth, and we know that one-fourth and one-fourth is two-fourths so it measures two-fourths also." The teacher finished the lesson on the first day by recording examples of the children's measurements and showing them how they could put an addition sign
between the fractional amounts to show that the two numbers were combined.
The president in addition signed
a renegotiated trade deal with Canada and Mexico this week.
Then I asked, "How can we write this as a mathematics problem?" Robin said, "I know!" and added addition signs
to the list on the board.
He added: "The proposed scheme consists of red surfacing and carriageway markings, in addition signs
are to be installed to highlight the entrance to the housing development."
"There are in addition signs
in red put up during the rutting season explaining it is dangerous and warning people not to approach the deer."