DSC1520 Revision Pack_COMPLETE
University of South Africa
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DSC1520 RevisionPack.
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---168november 20212021/2022A+
- Study Unit 1 : Mathematical preliminaries 
Chapter 1 : Sections 1.1 – 1.6 
1. Basics 
• Numbers: different type of numbers – Natural, Real, etc. Also called constants 
• Basic operations 
o + (add); 2 + 3 = 5 
o – (subtract); 3 – 2 = 1 
o x (multiply); also •; 3 x 2 = 3•2 = 6 
o ÷ (division) also / or fraction ( 1 
2 = 1 divide by 2); 
6÷3=6/3= 
6 
3 =2 
Remember: 
1 x anything = anything 
1 x 8 = 8 
0 x anything = 0 
0 x 4 = 0 
1 + anything = one more than anything 
1+345=346 ...
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