How many times do you need to divide by ten to get from 940.0 to 9.400
2 answers:
<h3><u>Answer: </u><u>2 times</u></h3>
Step-by-step explanation: Dividing decimals is the same concept as moving the decimal to the left. In this case, all you need to do is count how many digits to the left the decimal moved from 940.0 to 9.400:
(View image below)
As you can see, we had to move the decimal 2 places to the left to get to 9.400. So, you need to divide by ten 2 times to get from 940.0 to 9.400.
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We can use the sum of an aritmetic sequence
the sum from n=1 to n=r when the first term is a1 and the nth term is an is
first term is 1
last term is 100
there are 100 terms so n=100
so the sum is
S=5050
now you want us to divide by 10
5050/10=505
fun fact, gauss (famous math guy) did this when he was younger, legend has it that he was assigned this as an in class assigment to kill time but gauss found a neat pattern, he noticed that adding the end terms wer giving the same sum, example, 100+1=101, 2+99=101, etc, so he just needed to find al the pairs and add them all up
answer is 505
the result is 505
the sum from n=1 to n=r when the first term is a1 and the nth term is an is
first term is 1
last term is 100
there are 100 terms so n=100
so the sum is
S=5050
now you want us to divide by 10
5050/10=505
fun fact, gauss (famous math guy) did this when he was younger, legend has it that he was assigned this as an in class assigment to kill time but gauss found a neat pattern, he noticed that adding the end terms wer giving the same sum, example, 100+1=101, 2+99=101, etc, so he just needed to find al the pairs and add them all up
answer is 505
the result is 505