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I was given an 11 digit 'tracking number' but it the UPS website doesn't recognize it was a tracking number because it has only 11 digits and not 15 how do you track a UPS Ground Shipping Document?
you can track it here http://wwwapps.ups.com/WebTracking/reference
What was the first number discovered?
the first number discovered was I OR II (ROMAN NUMERALS) people first started to discover numbers by their hands or keeping track of their cattle first digit was '0'
How can you multiply 2-digit numbers using mental math?
There are several methods for doing this, but first, you should already be comfortable with adding 2 and 3 digit numbers. Practice this if you don't have confidence in your skill.In any of these methods, it helps to view the numbers on a grid, starting with the given two numbers each on their own line, just like when doing hand calculations. In the following examples, 'o' is used instead of '0' to represent "floating" numbers, i.e. numbers that have been shifted to the left by a certain number of spaces. The 'o's don't have to be a part of your mental image.Now as an example, try to multiply these two numbers:5329---??If you are comfortable multiplying two-digit numbers by one-digit numbers, then you could do it "textbook style": multiply the first number by the tens and then the ones (or vice verse) of the second number, and add the two results:__53x_29===_477106o===1537Most minds find this method too much of a strain, though. A simpler way is to multiply the digits one-by-one, first vertically then diagonally, while keeping a mental running total:5o x 2o = 10oo (total: 10oo)__53__29===10oo3 x 9 = 27 (total: 1027)__53__29===10275o x 9 = 45o (total: 1477)__53__29===14772o x 3 = 6o (total: 1537)__53__29===1537Using the running total means that you only need to keep track of 3 or 4 numbers at a time. This fits nicely into a tight square of digits which most people should be able to picture without trouble. You can also do these four digit-by-digit multiplications in any order you choose (just remember to do each of them once!).
How do you crack a 3-digit combination lock?
You can crack a 3-digit combination lock by sequentially trying every possible number. Writing down and keeping track of every number used will help avoid confusion and speed up results.
Why was the babylonian number system invented?
Those people dealt with the sexadecimal matemathical system which use a 60 digit base. with that they could keep track of time.
