Missing Signs
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Missing Signs
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for the BBC Microcomputer Models A and B

Put in signs
Addition/Subtraction
Multiplication/Division

This pack contains three programs on cassette. Loading instructions appear on the inside front cover of this pack. All other instructions are contained in the programs and are shown on the screen. Put in the Signs provides practice in addition, subtraction, multiplication and division. Each exercise presents the pupil with incomplete sums into which they must insert the sign which will make the calculation correct. If two incorrect attempts are made, the program provides the correct answer.

The two Missing Signs programs present addition and subtraction, or multiplication and division equations which have the balancing sign missing. The child must calculate both sides of the equation and decide whether the missing sign is greater than (i.e.>) or less than (i.e.<) or equal to (i.e. =). The equations contain one and two digit numbers.

All three programs offer a high degree of user control over the exercises presented to the child. The "Teachers' Notes" which appear at the beginning of each program give the user the opportunity to set the layout, difficulty, content and timing of the exercise before the child begins. Once these parameters are set, the program can be used by up to 20 children and their results will be stored for later recall.



About The Authors
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Russel Wills began his career in computing in 1965 when he joined IBM as a lecturer. He then worked in Africa for 5 years as a systems analyst, returning to the UK in 1972 to take up his present post as lecturer in computer education in Dundee.

Ann Wills is Head Teacher of a primary school. Russel and Ann Wills share a common interest in the development of software for the microcomputer, and the integration of this material into the school curriculum.



Contents
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INDEX
SIGNS
ADD-SUB
MLT-DIV



Loading
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To load and run the index place the cassette (fully re-wound) in the cassette recorder, type CHAIN "INDEX" and press RETURN; the "Searching" message should appear on the screen as you do this. Now press the PLAY button on the cassette recorder and wait for the index to load. This will take approximately 30 seconds.

Select the number of the program you want to load, and press RETURN. Normal cassette operating messages are given during loading. Once the correct position on the tape has been reached each program takes 2-3 minutes to load.

NOTE: Programs can be loaded and run in the usual way with the CHAIN command; to load and run ADD-SUB, for example, type

CHAIN "ADD-SUB"

and press RETURN.



Game Credits
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Authors: Ann and Russel Wills

Acornsoft Limited, 4a Market Hill, Cambridge, CB2 3NJ, England. ESM, Duke Street, Wisbech, Cambs PE13 2AE, England. Copyright © Acornsoft Limited 1982 Copyright (c) ESM 1982

ES112 SBE09