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The three programs on this tape are brilliant. Great use of machine code and Hi-res graphics.

In 'Adding', you count the number of blocks put onto the two wagons of a train, then you add them together. If you get your sums right, the train moves off in a Hi-res scroll, puffing smoke as it goes. 'Subtracting' shows you a graphical picture of a port. You then type in the number of crates you can see on the boat. You then type in the number of crates you can see on the boat. If you get this right, a little man runs down and taes some of the crates off - you then type in the number he has taken off followed by the number left.

'Ducks', the last program on the tape, is a combination of addition and subtraction. My favourite educational tape!