Sums game

When the children can program Roamer forwards and backwards to chosen numbers, without having to read the program, they wlll enjoy these sums games.

Children usually do not take long to remember that:

	forwards is the same as	+
	backwards is the same as	-

It can be played exactly as Moving to Chosen Numbers (0-9) except that you write the program in sum form.

For example if:

Roamer is placed on 0 . . . . .	0 + =
A child chooses, say, number 2 . . . . .	0 +  2  =
All children are then asked for answer. Roamer is programmed to see if they are right.
Answer is filled in . . . . .	0 +  2  =  2
Next child might choose number 5, write . . . . .	2 +  5  =

This activity can be adding only, take away or finding the missing number.