Graphs and Digraphs

May 19th, 2015
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Graph theory is one important aspect in Discrete mathematics. Graphs in this sense have nothing to do with the graphs of functions y = f(x) in the xy coordinate plane. Graphs were first introduced in the eighteenth century.

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Speed mathematics 2First rule of the mathematics:The easier the method you use to solve a problem, the faster you will solve it with less chance of making a mistakes.Why mathematics is important?????People equate mathematical ability with general intelligence.If you are good at maths, you are generally regarded as highly intelligent.High achieving maths students are treated differently by their teachers and colleagues.Mental calculations improves concentration, develops memory, and enhances the ability to retain several ideas at onceMathematical knowledge boosts your confidence and self-esteem.These methods will give you confidence in your mental faculties, intelligence and problem-solving abilities.1. MULTIPLYING NUMBERS UP TO 10: We will begin by learning how to multiply numbers up to 10x10E.g. 1 7X8=????Solution- 7 x 8 = 3 x 2Go to the first number 7. How many more do you need to make 10? The answer is 3.Go to the next number 8. How many more do you need to make 10? The answer is 2Then subtract diagonally. Take either one of the number. ( 7-2 =5 8-3= 5)7 x 8 =5(3 x 2)( put 5 on the left side and next to tat 5 put the multiplication of 3 and 2) and we get7 x 8 =56.2. MULTIPLYING NUMBERS GREATER THAN 10. (MULTIPLYING WITH A REFERENCE NUMBER)Using 100 as a reference number.10096 x 97 = 9300 (96-100= -4, 97-100=-3,), (97-4= 93 (diagonally sub))-4

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