About John Zalewski Expertise I can help you solve problems involving fractions, decimals, ratios, and algebra. I can teach you how to do math faster, and even in your head. I can teach math definitions, and help you study, if necessary. Please do not ask any graphing, trigonometry, or calculus questions. Try to work through homework questions before asking for assistance.
Experience I routinely process numbers of all kinds in my head, without need of a calculator.
Education/Credentials I was an A math student while in high school.
Question Hello John.
Is that true that n*0=0, where n is an integer?
Now :
15*2=30 which means 30/15=2 and 30/2=15
100*4=400 which means 400/100=4 and 400/4=100
20*5=100 which means 100/20=5 and 100/5=20
2*0=0 which means 0/2=0 and 0/0=2(????)
Isn't the result of integer times zero is undefined?
Please explain. Thanks.
Answer Hello, Joe.
To my knowledge, division by 0 is still a very confusing concept, even for mathematicians. Some say that 0/0 = 0; others say that the answer is undefined; even others say that the answer is infinite.
n(0) does equal 0, because you are either taking 0 groups of n, or n groups of 0, which of course is 0 in both instances.
My hand-held calculator gives 0/0 as equaling "E" (error), and my computer calculator gives the answer as undefined. I cannot help further. I am sorry.
